Pub Date : 2025-12-25DOI: 10.1016/j.optcom.2025.132836
Rashid G. Bikbaev , Ivan V. Timofeev , Aleksandr S. Aleksandrovsky
Orthorhombic strontium tetraborate (α-SBO) is a prospective optical material for future high-power applications in DUV and VUV. Limitations of α-SBO as a nonlinear optical material can be overridden by the use of spontaneous random domain structures inherent to this unique material. The present article reports spatially selective random quasi phase matching of nonlinear optical conversion in random structures of α-SBO that resulted in more than two orders of magnitude efficiency enhancement for the frequency doubling to the blue spectral region due to employing excellent radiation damage resistance of α-SBO and selection of most efficient parts of random structure. Further progress to DUV and VUV generation is prognosed via the development of technology in the direction of obtaining thinner average thickness of domains.
{"title":"Spatially selective enhancement of random quasi phase matched conversion in strontium tetraborate","authors":"Rashid G. Bikbaev , Ivan V. Timofeev , Aleksandr S. Aleksandrovsky","doi":"10.1016/j.optcom.2025.132836","DOIUrl":"10.1016/j.optcom.2025.132836","url":null,"abstract":"<div><div>Orthorhombic strontium tetraborate (α-SBO) is a prospective optical material for future high-power applications in DUV and VUV. Limitations of α-SBO as a nonlinear optical material can be overridden by the use of spontaneous random domain structures inherent to this unique material. The present article reports spatially selective random quasi phase matching of nonlinear optical conversion in random structures of α-SBO that resulted in more than two orders of magnitude efficiency enhancement for the frequency doubling to the blue spectral region due to employing excellent radiation damage resistance of α-SBO and selection of most efficient parts of random structure. Further progress to DUV and VUV generation is prognosed via the development of technology in the direction of obtaining thinner average thickness of domains.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"603 ","pages":"Article 132836"},"PeriodicalIF":2.5,"publicationDate":"2025-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We propose a silicon mode-evolution-based symmetric four-mode Y-junction for the 2-μm waveband. Compared with the conventional design with a direct connection between the stem and branch waveguides (zero-gap Y-junctions), the mode-evolution-based Y-junctions avoid sharp-tip structures at the branch, thereby relaxing the precision requirements during fabrication. However, mode-evolution-based Y-junctions tend to require long device lengths. To overcome this problem, we use adiabaticity engineering with radiation-loss reduction (AERR) to design the taper shape in the branching region of Y-junction. According to the simulations, length of the taper designed using AERR is about one-ninth that of a linear taper. In addition, the numerical results show that our Y-junction exhibits a low excess loss of <0.3 dB, and low mode crosstalk of < −16 dB for the four TE modes over the wavelength range of 2–2.2 μm. Furthermore, experimental results on fabricated SOI chips demonstrate the robustness of our mode-evolution-based Y-junction against structural distortion at the branch tip. The mode crosstalk of the mode-evolution-based Y-junction designed with AERR is smaller than that of the zero-gap Y-junction by 5 dB in the spectral range of 2–2.2 μm.
{"title":"Silicon mode-evolution-based symmetric four-mode Y-junction for the 2-μm waveband designed by adiabaticity engineering with radiation-loss reduction","authors":"Taichi Muratsubaki, Takanori Sato, Kunimasa Saitoh","doi":"10.1016/j.optcom.2025.132816","DOIUrl":"10.1016/j.optcom.2025.132816","url":null,"abstract":"<div><div>We propose a silicon mode-evolution-based symmetric four-mode Y-junction for the 2-μm waveband. Compared with the conventional design with a direct connection between the stem and branch waveguides (zero-gap Y-junctions), the mode-evolution-based Y-junctions avoid sharp-tip structures at the branch, thereby relaxing the precision requirements during fabrication. However, mode-evolution-based Y-junctions tend to require long device lengths. To overcome this problem, we use adiabaticity engineering with radiation-loss reduction (AERR) to design the taper shape in the branching region of Y-junction. According to the simulations, length of the taper designed using AERR is about one-ninth that of a linear taper. In addition, the numerical results show that our Y-junction exhibits a low excess loss of <0.3 dB, and low mode crosstalk of < −16 dB for the four TE modes over the wavelength range of 2–2.2 μm. Furthermore, experimental results on fabricated SOI chips demonstrate the robustness of our mode-evolution-based Y-junction against structural distortion at the branch tip. The mode crosstalk of the mode-evolution-based Y-junction designed with AERR is smaller than that of the zero-gap Y-junction by 5 dB in the spectral range of 2–2.2 μm.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"603 ","pages":"Article 132816"},"PeriodicalIF":2.5,"publicationDate":"2025-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145885896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-24DOI: 10.1016/j.optcom.2025.132835
Xu Cheng , Liu Yang , Chenlong Xu , Tao Yang , Haiming Gao , Tianhang Lian , Yonggang Zhang
The complex signal processing schemes for modulation/demodulation and residual intensity modulation (RIM) from non-ideal phase modulators limit the precision of resonant micro-optical gyroscope (RMOG). In order to solve the above problems, we propose a novel RMOG scheme based on polarization frequency-locking technique. The scheme is notable for its simplicity, requiring no modulation and demodulation while exhibiting 0.7-fold higher theoretical sensitivity than optimal triangular-wave modulation scheme. Furthermore, the scheme overcomes limitations of RIM and makes the gyro on-chip integration possible, paving the way for advanced RMOG development.
{"title":"Resonant micro-optical gyroscope based on polarization frequency-locking technique","authors":"Xu Cheng , Liu Yang , Chenlong Xu , Tao Yang , Haiming Gao , Tianhang Lian , Yonggang Zhang","doi":"10.1016/j.optcom.2025.132835","DOIUrl":"10.1016/j.optcom.2025.132835","url":null,"abstract":"<div><div>The complex signal processing schemes for modulation/demodulation and residual intensity modulation (RIM) from non-ideal phase modulators limit the precision of resonant micro-optical gyroscope (RMOG). In order to solve the above problems, we propose a novel RMOG scheme based on polarization frequency-locking technique. The scheme is notable for its simplicity, requiring no modulation and demodulation while exhibiting 0.7-fold higher theoretical sensitivity than optimal triangular-wave modulation scheme. Furthermore, the scheme overcomes limitations of RIM and makes the gyro on-chip integration possible, paving the way for advanced RMOG development.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"603 ","pages":"Article 132835"},"PeriodicalIF":2.5,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145885898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-24DOI: 10.1016/j.optcom.2025.132822
Diqing Ying
This paper proposes a novel intensity modulated fiber cantilever accelerometer based on vibration modulation and multiple harmonic demodulation. To suppress intensity noise, the acceleration signal is derived from the ratio of the first to the second harmonic demodulation signals, while the ratio of the second to the fourth harmonic signals stabilizes the modulation amplitude. Mathematical expressions for both harmonic and division signals are analytically established. Theoretical study shows the first-to-second harmonic ratio exhibits a linear range with a slope insensitive to gap width and cantilever length. This slope increases with modulation frequency but decreases with modulation amplitude. The second-to-fourth harmonic ratio scales linearly with the piezoelectric constant. While acceleration variations can perturb this ratio during amplitude stabilization, the method's overall practicality is unaffected. Under temperature fluctuations, the fluctuation of the first-to-second harmonic ratio increases with acceleration. Experimental results show vibration modulation generates the first, second and fourth harmonics, with the modulated signal's amplitude varying with optical power. The response of the accelerometer is characterized under acceleration varying from 1 g to -1 g, and its sensitivity is determined. Under optical power disturbances, neither the first-to-second nor the second-to-fourth harmonic signal ratio exhibits significant fluctuations, unlike the individual harmonic demodulation signals. The fluctuation in the first-to-second harmonic ratio is only 15.07 % of that in the first harmonic demodulation signal, demonstrating superior stability. Without such disturbances, the first-to-second harmonic ratio remains comparable in stability to the first harmonic.
{"title":"Intensity-modulation fiber cantilever accelerometer based on vibration modulation and multiple harmonic demodulation","authors":"Diqing Ying","doi":"10.1016/j.optcom.2025.132822","DOIUrl":"10.1016/j.optcom.2025.132822","url":null,"abstract":"<div><div>This paper proposes a novel intensity modulated fiber cantilever accelerometer based on vibration modulation and multiple harmonic demodulation. To suppress intensity noise, the acceleration signal is derived from the ratio of the first to the second harmonic demodulation signals, while the ratio of the second to the fourth harmonic signals stabilizes the modulation amplitude. Mathematical expressions for both harmonic and division signals are analytically established. Theoretical study shows the first-to-second harmonic ratio exhibits a linear range with a slope insensitive to gap width and cantilever length. This slope increases with modulation frequency but decreases with modulation amplitude. The second-to-fourth harmonic ratio scales linearly with the piezoelectric constant. While acceleration variations can perturb this ratio during amplitude stabilization, the method's overall practicality is unaffected. Under temperature fluctuations, the fluctuation of the first-to-second harmonic ratio increases with acceleration. Experimental results show vibration modulation generates the first, second and fourth harmonics, with the modulated signal's amplitude varying with optical power. The response of the accelerometer is characterized under acceleration varying from 1 g to -1 g, and its sensitivity is determined. Under optical power disturbances, neither the first-to-second nor the second-to-fourth harmonic signal ratio exhibits significant fluctuations, unlike the individual harmonic demodulation signals. The fluctuation in the first-to-second harmonic ratio is only 15.07 % of that in the first harmonic demodulation signal, demonstrating superior stability. Without such disturbances, the first-to-second harmonic ratio remains comparable in stability to the first harmonic.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"603 ","pages":"Article 132822"},"PeriodicalIF":2.5,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-24DOI: 10.1016/j.optcom.2025.132823
Ao Zhang, Lekai Ge, Mengli Zhu, Bintao Du, Chengchao Liu
All-dielectric metasurfaces, capable of manipulating the amplitude, phase, and polarization at the micro-nano scale, have been extensively applied in holographic imaging, vortex beam generation, and beam steering. However, their current fabrication remains limited to small areas, which severely restricts their use in large-scale applications. In this paper, we fabricate large-area metasurfaces using Anodic Alumina Oxide (AAO) as a template combined with electron-beam evaporation. A silicon metasurface embedded in the film is constructed by spin-coating a mixture of CdSe/ZnS quantum dots and polydimethylsiloxane (PDMS) atop the metasurface, aiming to achieve enhanced luminescence over a large area. Experimental and finite-difference time-domain (FDTD) simulation results reveal electric and magnetic dipole resonances in the visible light. Based on the Purcell effect, the silicon metasurfaces promote the photoluminescence of the film by about 25 %. This work offers a promising strategy for large-area metasurface fabrication and demonstrates significant potential for applications in large-area photoluminescence enhancement.
{"title":"Large-area all-dielectric metasurface for enhanced thin-film luminescence","authors":"Ao Zhang, Lekai Ge, Mengli Zhu, Bintao Du, Chengchao Liu","doi":"10.1016/j.optcom.2025.132823","DOIUrl":"10.1016/j.optcom.2025.132823","url":null,"abstract":"<div><div>All-dielectric metasurfaces, capable of manipulating the amplitude, phase, and polarization at the micro-nano scale, have been extensively applied in holographic imaging, vortex beam generation, and beam steering. However, their current fabrication remains limited to small areas, which severely restricts their use in large-scale applications. In this paper, we fabricate large-area metasurfaces using Anodic Alumina Oxide (AAO) as a template combined with electron-beam evaporation. A silicon metasurface embedded in the film is constructed by spin-coating a mixture of CdSe/ZnS quantum dots and polydimethylsiloxane (PDMS) atop the metasurface, aiming to achieve enhanced luminescence over a large area. Experimental and finite-difference time-domain (FDTD) simulation results reveal electric and magnetic dipole resonances in the visible light. Based on the Purcell effect, the silicon metasurfaces promote the photoluminescence of the film by about 25 %. This work offers a promising strategy for large-area metasurface fabrication and demonstrates significant potential for applications in large-area photoluminescence enhancement.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"604 ","pages":"Article 132823"},"PeriodicalIF":2.5,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145886134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-24DOI: 10.1016/j.optcom.2025.132833
Shuai Wang , Qin Han , Han Ye , Liyan Geng , Yu Zheng , Yuede Yang
We propose and experimentally demonstrate planar InAlAs/InGaAs avalanche photodiodes (APDs) without guard rings that exhibit high bandwidth and low dark current. Electric field simulations reveal that the entire avalanche layer of the planar InAlAs-APDs remains depleted during operation, with the resulting special characteristics analyzed via these simulations. Experimental results are in good agreement with simulations, confirming the reliability of the study. Under an incident light intensity of 10 μW, the fabricated top-incident non-reflective APD exhibits a unity-gain responsivity of 0.3 A/W at 1.55 μm, with a maximum gain of 50. At 90 % of the breakdown voltage, the APD exhibits a dark current of only 3 nA. Moreover, the InAlAs-APD shows excellent temperature stability, with a breakdown voltage temperature coefficient of 9 mV/K. The maximum 3 dB bandwidth is 40 GHz at a gain of 2.5, and it decreases gradually with increasing gain. These results indicate the promising potential of the proposed APD structure for high-performance optical communication applications.
我们提出并实验证明了无保护环的平面InAlAs/InGaAs雪崩光电二极管（apd）具有高带宽和低暗电流。电场模拟表明，平面inala - apd的整个雪崩层在运行过程中保持耗尽状态，并通过这些模拟分析了产生的特殊特性。实验结果与仿真结果吻合较好，验证了研究的可靠性。在入射光强为10 μW的条件下，该APD在1.55 μm处的单位增益响应率为0.3 a /W，最大增益为50。在90%击穿电压下，APD的暗电流仅为3na。此外，InAlAs-APD具有优异的温度稳定性，击穿电压温度系数为9 mV/K。最大3db带宽为40ghz，增益为2.5，随着增益的增加逐渐减小。这些结果表明了所提出的APD结构在高性能光通信应用中的巨大潜力。
{"title":"High-bandwidth and low-dark-current planar InAlAs/InGaAs avalanche photodiodes","authors":"Shuai Wang , Qin Han , Han Ye , Liyan Geng , Yu Zheng , Yuede Yang","doi":"10.1016/j.optcom.2025.132833","DOIUrl":"10.1016/j.optcom.2025.132833","url":null,"abstract":"<div><div>We propose and experimentally demonstrate planar InAlAs/InGaAs avalanche photodiodes (APDs) without guard rings that exhibit high bandwidth and low dark current. Electric field simulations reveal that the entire avalanche layer of the planar InAlAs-APDs remains depleted during operation, with the resulting special characteristics analyzed via these simulations. Experimental results are in good agreement with simulations, confirming the reliability of the study. Under an incident light intensity of 10 μW, the fabricated top-incident non-reflective APD exhibits a unity-gain responsivity of 0.3 A/W at 1.55 μm, with a maximum gain of 50. At 90 % of the breakdown voltage, the APD exhibits a dark current of only 3 nA. Moreover, the InAlAs-APD shows excellent temperature stability, with a breakdown voltage temperature coefficient of 9 mV/K. The maximum 3 dB bandwidth is 40 GHz at a gain of 2.5, and it decreases gradually with increasing gain. These results indicate the promising potential of the proposed APD structure for high-performance optical communication applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"603 ","pages":"Article 132833"},"PeriodicalIF":2.5,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To stabilize the frequency difference of the two-cavity dual-frequency Nd:YAG laser (TCDFL), a frequency difference stabilization system for the TCDFL using quadrature-demodulated digital Pound-Drever-Hall (QDD-PDH) method has been designed, which is composed of two sets of QDD-PDH frequency stabilization subsystems. The digital quadrature phase-sensitive detection technology being used, the heterodyne interference signal of each QDD-PDH subsystem is demodulated to obtain a PDH frequency stabilization error signal, which is employed to determine the frequency correction voltage by the proportional-intergral algorithm. Subsequently, the frequency correction voltages are fed back to adjust the lengths of both cavities in order that both frequencies of the TCDFL can be simultaneously stabilized to the two different resonant frequencies of the Fabry-Pérot cavity, the frequency difference of the dual-frequency laser being stabilized. A TCDFL frequency difference stabilization system has been established and investigated experimentally, and the experimental results have indicated that the average values of the frequency discrimination sensitivities for the two subsystems are 221 ± 15 mV/MHz and 161 ± 12 mV/MHz, respectively. And the frequency drifts are less than 0.34 ± 0.02 MHz and 0.44 ± 0.03 MHz over half an hour, respectively. Additionally, the corresponding frequency difference drift is less than 0.50 ± 0.05 MHz. Such a frequency-difference-stabilized TCDFL using the QDD-PDH method will find wide applications in the fields of synthetic-wave absolute-distance interferometry, THz-wave generation, etc.
{"title":"Design of frequency difference stabilization system for two-cavity dual-frequency solid-state laser using quadrature-demodulated digital Pound-Drever-Hall method","authors":"Guangtao Li, Mingxing Jiao, Weiyi Wang, Hao Zhu, Junhong Xing, Yun Liu","doi":"10.1016/j.optcom.2025.132821","DOIUrl":"10.1016/j.optcom.2025.132821","url":null,"abstract":"<div><div>To stabilize the frequency difference of the two-cavity dual-frequency Nd:YAG laser (TCDFL), a frequency difference stabilization system for the TCDFL using quadrature-demodulated digital Pound-Drever-Hall (QDD-PDH) method has been designed, which is composed of two sets of QDD-PDH frequency stabilization subsystems. The digital quadrature phase-sensitive detection technology being used, the heterodyne interference signal of each QDD-PDH subsystem is demodulated to obtain a PDH frequency stabilization error signal, which is employed to determine the frequency correction voltage by the proportional-intergral algorithm. Subsequently, the frequency correction voltages are fed back to adjust the lengths of both cavities in order that both frequencies of the TCDFL can be simultaneously stabilized to the two different resonant frequencies of the Fabry-Pérot cavity, the frequency difference of the dual-frequency laser being stabilized. A TCDFL frequency difference stabilization system has been established and investigated experimentally, and the experimental results have indicated that the average values of the frequency discrimination sensitivities for the two subsystems are 221 ± 15 mV/MHz and 161 ± 12 mV/MHz, respectively. And the frequency drifts are less than 0.34 ± 0.02 MHz and 0.44 ± 0.03 MHz over half an hour, respectively. Additionally, the corresponding frequency difference drift is less than 0.50 ± 0.05 MHz. Such a frequency-difference-stabilized TCDFL using the QDD-PDH method will find wide applications in the fields of synthetic-wave absolute-distance interferometry, THz-wave generation, etc.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"603 ","pages":"Article 132821"},"PeriodicalIF":2.5,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145885897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We propose and demonstrate a structural accelerometer based on a fiber Bragg grating Fabry–Perot interferometer that abandons the traditional mechanical structure. External perturbations act directly upon the wound fiber. By tuning the initial winding tension, the clamping component width, and the fiber suspension distance, both the sensitivity and natural frequency of the accelerometer can be adjusted. We derive the theoretical formulations, and the experimental results exhibit close agreement with the simulations. The theoretical expressions for the accelerometer’s sensitivity and natural frequency are confirmed through experiments. The experiment results indicate that adjusting relevant parameters can tune the accelerometer’s natural frequency between 30 and 110 Hz, with a maximum sensitivity reaching 1556.76 rad/g at 30 Hz. Increasing the fiber winding tension effectively reduces sensitivity, thereby expanding the accelerometer’s working bandwidth. The size and sensitivity of the accelerometer can be balanced by adjusting the clamping component width and the suspension distance. This study offers general design guidelines for the development of analogous sensors in the field of fiber optic sensing.
{"title":"Fiber optic accelerometer with high quality factor and sensitivity enabled by lateral force","authors":"Lingjing Ran, Yueqi Zhang, Ranyang Li, Shuangshuang Li, Rui Zhou, Xueguang Qiao","doi":"10.1016/j.optcom.2025.132818","DOIUrl":"10.1016/j.optcom.2025.132818","url":null,"abstract":"<div><div>We propose and demonstrate a structural accelerometer based on a fiber Bragg grating Fabry–Perot interferometer that abandons the traditional mechanical structure. External perturbations act directly upon the wound fiber. By tuning the initial winding tension, the clamping component width, and the fiber suspension distance, both the sensitivity and natural frequency of the accelerometer can be adjusted. We derive the theoretical formulations, and the experimental results exhibit close agreement with the simulations. The theoretical expressions for the accelerometer’s sensitivity and natural frequency are confirmed through experiments. The experiment results indicate that adjusting relevant parameters can tune the accelerometer’s natural frequency between 30 and 110 Hz, with a maximum sensitivity reaching 1556.76 rad/g at 30 Hz. Increasing the fiber winding tension effectively reduces sensitivity, thereby expanding the accelerometer’s working bandwidth. The size and sensitivity of the accelerometer can be balanced by adjusting the clamping component width and the suspension distance. This study offers general design guidelines for the development of analogous sensors in the field of fiber optic sensing.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"604 ","pages":"Article 132818"},"PeriodicalIF":2.5,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-23DOI: 10.1016/j.optcom.2025.132820
Yan Yang , Yulin Wang , Ping Zhang , Yanli Xu , Zhen Yang
Structural color enables eco-friendly and tunable coloring beyond traditional pigments. In this study, we propose a fully symmetric microcavity system based on a Bragg reflector/SbS hybrid structure, enabling actively controlled dynamic color generation. Our results demonstrate that by precisely tuning the thickness of the SbS layer, ultranarrow transmission peaks with full width at half maximum below 30 nm can be achieved, yielding highly saturated colors across the entire visible spectrum. Crucially, leveraging the reversible amorphous-to-crystalline phase transition of SbS, we realize concurrent modulation of both color saturation and brightness over multiple spectral bands. To evaluate visual stability under practical viewing conditions, we systematically investigate the angular optical response from 0° to 50°. The device exhibits characteristic angular dispersion, with the transmission peak shifting toward shorter wavelengths as the incident angle increases. However, under both s- and p-polarizations, the output color evolves along a consistent trajectory in chromaticity space. This directional consistency, combined with the human eye’s tolerance to gradual color differences, helps maintain a relatively stable perceived color at macroscopic scales. Furthermore, the planar, lithography-free design enables scalable fabrication and provides a practical platform for dynamic structural color devices, with promising applications in intelligent displays, anti-counterfeiting, and optical storage.
{"title":"Dynamic structural color modulation via Sb2S3 phase-transition photonic architectures","authors":"Yan Yang , Yulin Wang , Ping Zhang , Yanli Xu , Zhen Yang","doi":"10.1016/j.optcom.2025.132820","DOIUrl":"10.1016/j.optcom.2025.132820","url":null,"abstract":"<div><div>Structural color enables eco-friendly and tunable coloring beyond traditional pigments. In this study, we propose a fully symmetric microcavity system based on a Bragg reflector/Sb<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>S<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> hybrid structure, enabling actively controlled dynamic color generation. Our results demonstrate that by precisely tuning the thickness of the Sb<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>S<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> layer, ultranarrow transmission peaks with full width at half maximum below 30 nm can be achieved, yielding highly saturated colors across the entire visible spectrum. Crucially, leveraging the reversible amorphous-to-crystalline phase transition of Sb<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>S<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>, we realize concurrent modulation of both color saturation and brightness over multiple spectral bands. To evaluate visual stability under practical viewing conditions, we systematically investigate the angular optical response from 0° to 50°. The device exhibits characteristic angular dispersion, with the transmission peak shifting toward shorter wavelengths as the incident angle increases. However, under both s- and p-polarizations, the output color evolves along a consistent trajectory in chromaticity space. This directional consistency, combined with the human eye’s tolerance to gradual color differences, helps maintain a relatively stable perceived color at macroscopic scales. Furthermore, the planar, lithography-free design enables scalable fabrication and provides a practical platform for dynamic structural color devices, with promising applications in intelligent displays, anti-counterfeiting, and optical storage.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"603 ","pages":"Article 132820"},"PeriodicalIF":2.5,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tactile sensors possess the capability to detect geometric shapes through direct physical contact without relying on complex data processing algorithms, offering broad application prospects in industrial automation and intelligent manufacturing. However, conventional tactile sensors are often susceptible to electromagnetic interference, which limits their practical utility. To address this issue, we propose a novel passive array-type shape-recognition tactile sensor (SRTS) based on a hemispherical architecture. When the ZnS:Cu@Al2O3 mechanoluminescent material is subjected to external force, mechanical stimulation is converted into an optical signal. Leveraging this luminescent property, we designed and fabricated a 3 × 3 sensing array composed of hemispherical structures with different radii. While enhancing the sensitivity of the mechanoluminescent signal, the system exploits the strain-response characteristics of individual hemispherical structures and the signal variations induced by changes in the distance between the hemispherical structure and the microsphere probe tip, thereby enabling effective recognition of the geometric shape of contacting objects. On this basis, we further derived a force–optical coupling model to correlate the output light intensity with the applied force. The SRTS demonstrates excellent pressure-sensing performance, with a loading response time of 110 ms and an unloading response time of 90 ms, along with good stability and durability. Moreover, the array architecture can be flexibly scaled to meet the requirements of various practical application scenarios. This study not only extends the application boundaries of mechanoluminescent materials in tactile perception but also provides new perspectives and design strategies for future implementations in photonic skin and robotic tactile sensing.
{"title":"Passive array-type shape-recognition tactile sensor based on mechanoluminescent effect","authors":"Weijie Yan, Chunlei Jiang, Zhaoqi Ji, Keyong Shao, Yu Sun, Yang Liu, Peng Chen, Hongbo Bi, Hongwei Liang, Yuan Liu, Zhicheng Cong","doi":"10.1016/j.optcom.2025.132810","DOIUrl":"10.1016/j.optcom.2025.132810","url":null,"abstract":"<div><div>Tactile sensors possess the capability to detect geometric shapes through direct physical contact without relying on complex data processing algorithms, offering broad application prospects in industrial automation and intelligent manufacturing. However, conventional tactile sensors are often susceptible to electromagnetic interference, which limits their practical utility. To address this issue, we propose a novel passive array-type shape-recognition tactile sensor (SRTS) based on a hemispherical architecture. When the ZnS:Cu@Al<sub>2</sub>O<sub>3</sub> mechanoluminescent material is subjected to external force, mechanical stimulation is converted into an optical signal. Leveraging this luminescent property, we designed and fabricated a 3 × 3 sensing array composed of hemispherical structures with different radii. While enhancing the sensitivity of the mechanoluminescent signal, the system exploits the strain-response characteristics of individual hemispherical structures and the signal variations induced by changes in the distance between the hemispherical structure and the microsphere probe tip, thereby enabling effective recognition of the geometric shape of contacting objects. On this basis, we further derived a force–optical coupling model to correlate the output light intensity with the applied force. The SRTS demonstrates excellent pressure-sensing performance, with a loading response time of 110 ms and an unloading response time of 90 ms, along with good stability and durability. Moreover, the array architecture can be flexibly scaled to meet the requirements of various practical application scenarios. This study not only extends the application boundaries of mechanoluminescent materials in tactile perception but also provides new perspectives and design strategies for future implementations in photonic skin and robotic tactile sensing.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"603 ","pages":"Article 132810"},"PeriodicalIF":2.5,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号