Dissipation of the energy stored in the modes of a cylindrical microcavity with minor radius variations perturbs the temperature of the resonator, significantly affecting the mode structure. We experimentally demonstrate that thermal drifts not only shift the mode spectrum as a whole but also alter the free spectral range between adjacent axial modes and give rise to new eigenmodes. Through a numerical model, we show that in microresonators suitable for low-frequency comb generation, the thermally induced dispersion can be comparable to the mode linewidth. Fortunately, the positive sign of the dispersion does not hinder the modulation instability required for nonlinear generation.
{"title":"Modal dispersion in a cylindrical WGM microcavity caused by modal energy dissipation","authors":"Arkady Novikov , Hiba Rizk , Dmitry Kudashkin , Victor Simonov , Alena Kolesnikova , Ilya Vatnik","doi":"10.1016/j.optcom.2025.131641","DOIUrl":"10.1016/j.optcom.2025.131641","url":null,"abstract":"<div><div>Dissipation of the energy stored in the modes of a cylindrical microcavity with minor radius variations perturbs the temperature of the resonator, significantly affecting the mode structure. We experimentally demonstrate that thermal drifts not only shift the mode spectrum as a whole but also alter the free spectral range between adjacent axial modes and give rise to new eigenmodes. Through a numerical model, we show that in microresonators suitable for low-frequency comb generation, the thermally induced dispersion can be comparable to the mode linewidth. Fortunately, the positive sign of the dispersion does not hinder the modulation instability required for nonlinear generation.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131641"},"PeriodicalIF":2.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552034","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 : 2025-02-28DOI: 10.1016/j.optcom.2025.131682
Maryam Khodadadi, Najmeh Nozhat
This study marks a pioneering exploration of how metal placement and the number of metal layers influence the design of hybrid plasmonic waveguide (HPW)-fed nanoantennas, both theoretically and numerically, laying a cornerstone for the development of on-chip wireless links. Emphasizing the creation of a horizontal radiation pattern, the use of dielectric and HPW-based directors has been investigated, examining their effects on radiation direction through identical and opposing configurations. Utilizing genetic algorithms to theoretically solve the complex dispersion equation, key optical properties including propagation length, confinement factor, figure of merit, and effective refractive index have been studied. These properties are essential for evaluating performance across dielectric and metal cap structures, as well as metal-insulator-metal HPW designs, accommodating both long-range (LR) and short-range (SR) transverse magnetic (TM) modes. Furthermore, for the first time, the proposed multi-layer HPW-fed nanoantenna achieves high gains of 10.4 and 8.79 dB for LR and SR modes, respectively, with radiation efficiencies of 0.084 and 0.45 dB. This comprehensive analysis, including a point-to-point wireless link validation using novel topologies, sets a new benchmark for optimizing on-chip communication systems.
{"title":"Enhancing wireless on-chip links: Theoretical insights into metal placement in hybrid plasmonic waveguide-fed nanoantennas","authors":"Maryam Khodadadi, Najmeh Nozhat","doi":"10.1016/j.optcom.2025.131682","DOIUrl":"10.1016/j.optcom.2025.131682","url":null,"abstract":"<div><div>This study marks a pioneering exploration of how metal placement and the number of metal layers influence the design of hybrid plasmonic waveguide (HPW)-fed nanoantennas, both theoretically and numerically, laying a cornerstone for the development of on-chip wireless links. Emphasizing the creation of a horizontal radiation pattern, the use of dielectric and HPW-based directors has been investigated, examining their effects on radiation direction through identical and opposing configurations. Utilizing genetic algorithms to theoretically solve the complex dispersion equation, key optical properties including propagation length, confinement factor, figure of merit, and effective refractive index have been studied. These properties are essential for evaluating performance across dielectric and metal cap structures, as well as metal-insulator-metal HPW designs, accommodating both long-range (LR) and short-range (SR) transverse magnetic (TM) modes. Furthermore, for the first time, the proposed multi-layer HPW-fed nanoantenna achieves high gains of 10.4 and 8.79 dB for LR and SR modes, respectively, with radiation efficiencies of 0.084 and 0.45 dB. This comprehensive analysis, including a point-to-point wireless link validation using novel topologies, sets a new benchmark for optimizing on-chip communication systems.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"582 ","pages":"Article 131682"},"PeriodicalIF":2.2,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552097","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 : 2025-02-28DOI: 10.1016/j.optcom.2025.131685
Ziqi Zhang , Shoufeng Tong , Peng Lin , Baiqiu Zhao , Jingmei Ye , Xiaonan Yu
Space laser communication technology offers several advantages, including high speed, large capacity, and robust anti-interference capabilities. In comparison to traditional direct detection laser communication, coherent laser communication technology exhibits enhanced sensitivity, spectral efficiency, and the capacity for multiple debugging formats. Consequently, it is becoming the dominant development direction in the field of high-speed and long-distance space laser communication between satellites. The relative motion of the satellite platform gives rise to angle misalignments in the transmitting and receiving terminals, resulting in alignment mismatch losses and phase errors. This, in turn, leads to a reduction in the signal-to-noise ratio (SNR) and an increase in the bit error rate (BER). In light of the aforementioned issues, this study establishes a mathematical model of the relationship between angle misalignment and BER in coherent laser communication. Additionally, a 10 Gbps Polarization Multiplexed Quadrature Phase Shift Keying (PM-QPSK) inter-satellite coherent laser communication experimental system is bulit. The use of fast steering mirror (FSM) serves to simulate inter-satellite angle misalignment. The influence of angular misalignment on various communication parameters, including received optical power, error vector magnitude (EVM), constellation diagram, and BER, is investigated. The experimental results demonstrate that when the transmitter and receiver are in a collimated state, the received optical power is −30 dBm, the EVM is 7.33%, the BER is 2.5E-13, and the constellation diagram is within acceptable limits. As the angular misalignment between the transmitter and receiver is increased gradually to 320 μrad, the received optical power decreases by 12 dB to −42 dBm, the EVM decreases to 15.73%, the BER increases by approximately three orders of magnitude, and the constellation diagram deteriorates. This study offers a reference point for the measurement and compensation of angular misalignment in coherent laser communication, and provides significant guidance for the design of inter-satellite coherent laser communication terminals.
{"title":"Research on the influence mechanism of angular misalignment on the transmission performance in inter-satellite coherent laser communication","authors":"Ziqi Zhang , Shoufeng Tong , Peng Lin , Baiqiu Zhao , Jingmei Ye , Xiaonan Yu","doi":"10.1016/j.optcom.2025.131685","DOIUrl":"10.1016/j.optcom.2025.131685","url":null,"abstract":"<div><div>Space laser communication technology offers several advantages, including high speed, large capacity, and robust anti-interference capabilities. In comparison to traditional direct detection laser communication, coherent laser communication technology exhibits enhanced sensitivity, spectral efficiency, and the capacity for multiple debugging formats. Consequently, it is becoming the dominant development direction in the field of high-speed and long-distance space laser communication between satellites. The relative motion of the satellite platform gives rise to angle misalignments in the transmitting and receiving terminals, resulting in alignment mismatch losses and phase errors. This, in turn, leads to a reduction in the signal-to-noise ratio (SNR) and an increase in the bit error rate (BER). In light of the aforementioned issues, this study establishes a mathematical model of the relationship between angle misalignment and BER in coherent laser communication. Additionally, a 10 Gbps Polarization Multiplexed Quadrature Phase Shift Keying (PM-QPSK) inter-satellite coherent laser communication experimental system is bulit. The use of fast steering mirror (FSM) serves to simulate inter-satellite angle misalignment. The influence of angular misalignment on various communication parameters, including received optical power, error vector magnitude (EVM), constellation diagram, and BER, is investigated. The experimental results demonstrate that when the transmitter and receiver are in a collimated state, the received optical power is −30 dBm, the EVM is 7.33%, the BER is 2.5E-13, and the constellation diagram is within acceptable limits. As the angular misalignment between the transmitter and receiver is increased gradually to 320 μrad, the received optical power decreases by 12 dB to −42 dBm, the EVM decreases to 15.73%, the BER increases by approximately three orders of magnitude, and the constellation diagram deteriorates. This study offers a reference point for the measurement and compensation of angular misalignment in coherent laser communication, and provides significant guidance for the design of inter-satellite coherent laser communication terminals.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131685"},"PeriodicalIF":2.2,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562242","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 : 2025-02-28DOI: 10.1016/j.optcom.2025.131675
Cheng Huang , Rui Zhuang , Qinyue Yang , Guobing Liu , Qianqian Zhou , Xiangping Zhu , Yin Cai , Wei Zhao , Yanpeng Zhang
The quantum squeeze generated by energy level cascade four-wave mixing (ELC-FWM) in the PT symmetry and symmetry breaking coexistence region in an atomic system was studied by adjusting the ratio of the Rabi frequency of the dressing field to the dephasing rate of the energy level in this work. It was found that when the Rabi frequency of the dressing field dominates, the dressing field has the advantage of increasing the quantum squeeze while decreasing the nonlinear gain of the non-Hermitian system. Although the quantum squeeze is relatively weak, the dressing field has the advantage of improving the nonlinear gain characteristics when the dephasing rate of the energy level is dominant. This has the potential to be applied to the development of quantum metrology, quantum information processing and quantum memory devices.
{"title":"Multimode quantum squeezed in natural non-Hermitian systems with dressing quantization","authors":"Cheng Huang , Rui Zhuang , Qinyue Yang , Guobing Liu , Qianqian Zhou , Xiangping Zhu , Yin Cai , Wei Zhao , Yanpeng Zhang","doi":"10.1016/j.optcom.2025.131675","DOIUrl":"10.1016/j.optcom.2025.131675","url":null,"abstract":"<div><div>The quantum squeeze generated by energy level cascade four-wave mixing (ELC-FWM) in the PT symmetry and symmetry breaking coexistence region in an atomic system was studied by adjusting the ratio of the Rabi frequency of the dressing field to the dephasing rate of the energy level in this work. It was found that when the Rabi frequency of the dressing field dominates, the dressing field has the advantage of increasing the quantum squeeze while decreasing the nonlinear gain of the non-Hermitian system. Although the quantum squeeze is relatively weak, the dressing field has the advantage of improving the nonlinear gain characteristics when the dephasing rate of the energy level is dominant. This has the potential to be applied to the development of quantum metrology, quantum information processing and quantum memory devices.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"582 ","pages":"Article 131675"},"PeriodicalIF":2.2,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552096","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 : 2025-02-28DOI: 10.1016/j.optcom.2025.131659
Ning Xu , Wenqi Ge , Zhenao Bai , Xiaochao Yan , Yingtong Shi , Xida Han , Xianlin Wu , Xudong Lin , Ming Li
A high-energy, high-beam-quality, all-solid-state, dual-wavelength picosecond laser is designed for spatial-target ranging. This system features a fundamental-frequency laser with a bandwidth of 0.3 nm, a pulse energy of 310 mJ, a pulse duration of 70 ps, and a beam quality factor M2 of ≤2 at a repetition rate of 100 Hz. The laser operates on a master oscillator power amplifier configuration, comprising the following: a neodymium-doped yttrium orthovanadate (Nd:YVO4) mode-locked oscillator, a laser diode-end-pumped neodymium-doped yttrium aluminum garnet (Nd:YAG) regenerative amplifier, a pre-amplifier, and a single-stage, dual-pass, traveling-wave amplifier. High-efficiency second-harmonic generation at 532 nm is achieved via type-I phase matching with a LiB3O5 (LBO) crystal. A green laser with 208 mJ pulse energy is generated using a 1064 nm laser with 310 mJ input, achieving a maximum conversion efficiency of 67.1%. The system emits cochannel laser pulses both at 1064 and 532 nm, representing a promising light source for spatial-target ranging.
{"title":"High-energy, high-beam-quality, dual-wavelength picosecond laser source for ultraremote spatial-target ranging","authors":"Ning Xu , Wenqi Ge , Zhenao Bai , Xiaochao Yan , Yingtong Shi , Xida Han , Xianlin Wu , Xudong Lin , Ming Li","doi":"10.1016/j.optcom.2025.131659","DOIUrl":"10.1016/j.optcom.2025.131659","url":null,"abstract":"<div><div>A high-energy, high-beam-quality, all-solid-state, dual-wavelength picosecond laser is designed for spatial-target ranging. This system features a fundamental-frequency laser with a bandwidth of 0.3 nm, a pulse energy of 310 mJ, a pulse duration of 70 ps, and a beam quality factor <em>M</em><sup>2</sup> of ≤2 at a repetition rate of 100 Hz. The laser operates on a master oscillator power amplifier configuration, comprising the following: a neodymium-doped yttrium orthovanadate (Nd:YVO<sub>4</sub>) mode-locked oscillator, a laser diode-end-pumped neodymium-doped yttrium aluminum garnet (Nd:YAG) regenerative amplifier, a pre-amplifier, and a single-stage, dual-pass, traveling-wave amplifier. High-efficiency second-harmonic generation at 532 nm is achieved via type-I phase matching with a LiB<sub>3</sub>O<sub>5</sub> (LBO) crystal. A green laser with 208 mJ pulse energy is generated using a 1064 nm laser with 310 mJ input, achieving a maximum conversion efficiency of 67.1%. The system emits cochannel laser pulses both at 1064 and 532 nm, representing a promising light source for spatial-target ranging.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131659"},"PeriodicalIF":2.2,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562239","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 : 2025-02-28DOI: 10.1016/j.optcom.2025.131683
Jingwen Xu , Jianfeng Li , Xiaoshuang Liu
Optical camera communication (OCC) is a special type of visible light communication (VLC) using complementary-metal-oxide-semiconductor (CMOS) camera as receivers. However, OCC is limited by the heterogeneous reflective background in non-line-of-sight (NLOS). A background removal method is presented in this paper based on Gaussian mixture model (GMM). GMM is used to model each pixel of the background frame, and the bright and dark fringes generated by the rolling shutter effect are obtained by subtracting the background frame from the data frame. Bit error rate (BER) performance with purpose method is given at different ambient illuminances and transmission distances. The BER is 9.3 × 10−4 under the condition of 350lux ambient light and 1 m distance with transmission rate of 1.2kbits/s.
{"title":"Background removal using Gaussian mixture model for optical camera communications","authors":"Jingwen Xu , Jianfeng Li , Xiaoshuang Liu","doi":"10.1016/j.optcom.2025.131683","DOIUrl":"10.1016/j.optcom.2025.131683","url":null,"abstract":"<div><div>Optical camera communication (OCC) is a special type of visible light communication (VLC) using complementary-metal-oxide-semiconductor (CMOS) camera as receivers. However, OCC is limited by the heterogeneous reflective background in non-line-of-sight (NLOS). A background removal method is presented in this paper based on Gaussian mixture model (GMM). GMM is used to model each pixel of the background frame, and the bright and dark fringes generated by the rolling shutter effect are obtained by subtracting the background frame from the data frame. Bit error rate (BER) performance with purpose method is given at different ambient illuminances and transmission distances. The BER is 9.3 × 10<sup>−4</sup> under the condition of 350lux ambient light and 1 m distance with transmission rate of 1.2kbits/s.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131683"},"PeriodicalIF":2.2,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580719","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 : 2025-02-27DOI: 10.1016/j.optcom.2025.131665
L. Nagli , K. Kulikov
This study examines the performance of Laser-Induced Plasma Lasers (LIPLs) using a four-level generation system. Population inversion, necessary for laser operation, is achieved mostly, through collisional transitions from the pumped level. The research highlights that direct collisions, which skip intermediate levels, are more efficient at achieving population inversion than multi-step cascade processes. When the energy gap between the pumped and upper-generation levels is very small (≤ 0.1 eV), these levels effectively merge into a single state, creating a quasi-direct generation (QDG) scheme. This QDG scheme often follows the same polarization rules as the direct generation (DG) scheme.
{"title":"Four-level generation in Laser-Induced Plasma Lasers","authors":"L. Nagli , K. Kulikov","doi":"10.1016/j.optcom.2025.131665","DOIUrl":"10.1016/j.optcom.2025.131665","url":null,"abstract":"<div><div>This study examines the performance of Laser-Induced Plasma Lasers (LIPLs) using a <strong>four-level</strong> generation system. Population inversion, necessary for laser operation, is achieved mostly, through collisional transitions from the pumped level. The research highlights that direct collisions, which skip intermediate levels, are more efficient at achieving population inversion than multi-step cascade processes. When the energy gap between the pumped and upper-generation levels is very small (≤ 0.1 eV), these levels effectively merge into a single state, creating a quasi-direct generation (QDG) scheme. This QDG scheme often follows the same polarization rules as the direct generation (DG) scheme.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131665"},"PeriodicalIF":2.2,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562235","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 : 2025-02-27DOI: 10.1016/j.optcom.2025.131674
Yunfei Li, Qingshen Hu, Fuhong Cai, Qian Liu
Recently, due to its high penetration depth and molecular monitoring capabilities, the optical sensing and imaging of biological tissues in the short-wave infrared band have attracted much attention. However, because of the limitations of the spectral response bands of traditional indium gallium arsenide-based (InGaAs) detectors and CMOS chips, most of the research on biological tissue in the SWIR band mainly focuses on the 1150 nm–1700 nm band. High-throughput optical sensing in the 1700 nm–2200 nm wavelength band is relatively rarely reported. In this work, a novel biological tissue spectral detection prototype was developed, which mainly contains an electrically switchable fiber bundle probe and short-wave infrared spectrometers, to achieve optical detection of biological tissues in the spatial, temporal, and spectral domains within the 1150 nm–2200 nm band. Based on an improved Monte Carlo simulation as a forward problem model, spatial and spectral domain information were used to reconstruct the absorption and scattering coefficients of biological tissues within the 1150 nm–2200 nm band. By utilizing time-domain data, pulse wave information can be extracted from skin tissue. It offers a comprehensive solution with significant potential for detailed optical parameter analysis and sensitive bio-molecule quantification in the short-wave infrared band.
{"title":"Short wave infrared band Spatial-Temporal-Spectral resolved sensing system and its application in bio-samples measurement","authors":"Yunfei Li, Qingshen Hu, Fuhong Cai, Qian Liu","doi":"10.1016/j.optcom.2025.131674","DOIUrl":"10.1016/j.optcom.2025.131674","url":null,"abstract":"<div><div>Recently, due to its high penetration depth and molecular monitoring capabilities, the optical sensing and imaging of biological tissues in the short-wave infrared band have attracted much attention. However, because of the limitations of the spectral response bands of traditional indium gallium arsenide-based (InGaAs) detectors and CMOS chips, most of the research on biological tissue in the SWIR band mainly focuses on the 1150 nm–1700 nm band. High-throughput optical sensing in the 1700 nm–2200 nm wavelength band is relatively rarely reported. In this work, a novel biological tissue spectral detection prototype was developed, which mainly contains an electrically switchable fiber bundle probe and short-wave infrared spectrometers, to achieve optical detection of biological tissues in the spatial, temporal, and spectral domains within the 1150 nm–2200 nm band. Based on an improved Monte Carlo simulation as a forward problem model, spatial and spectral domain information were used to reconstruct the absorption and scattering coefficients of biological tissues within the 1150 nm–2200 nm band. By utilizing time-domain data, pulse wave information can be extracted from skin tissue. It offers a comprehensive solution with significant potential for detailed optical parameter analysis and sensitive bio-molecule quantification in the short-wave infrared band.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131674"},"PeriodicalIF":2.2,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619287","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 : 2025-02-27DOI: 10.1016/j.optcom.2025.131676
Lutai Fan , Haofei Chen , Peng Jia , Lijie Cao , Qian Liu , Baiheng Liu , Yongyi Chen , Li Qin , Lei Liang , Yuxin Lei , Cheng Qiu , Yue Song , Yubing Wang , Yongqiang Ning , Lijun Wang
To achieve high-power laser output with a low divergence angle, this study designs and fabricates a 730 nm high-power edge-emitting semiconductor laser array. The device incorporates GaAsP/AlGaInP highly strain-compensated quantum wells to achieve lasing at a wavelength of 730 nm. AlGaInP, a material with a wider bandgap than AlGaAs, is employed as the waveguide material to enhance carrier confinement within the active region effectively. The designed 730 nm semiconductor laser array delivers a single-chip output power of 10 W at the target wavelength while maintaining the low divergence angle typical of a 6 μm single-emitter array. Furthermore, it exhibits low power degradation even under high-temperature conditions. This laser array offers a robust solution for practical applications in high-power far-red laser illumination, optical imaging, and high-beam-quality laser systems.
{"title":"High-power AlGaInP waveguide 730 nm edge-emitting array","authors":"Lutai Fan , Haofei Chen , Peng Jia , Lijie Cao , Qian Liu , Baiheng Liu , Yongyi Chen , Li Qin , Lei Liang , Yuxin Lei , Cheng Qiu , Yue Song , Yubing Wang , Yongqiang Ning , Lijun Wang","doi":"10.1016/j.optcom.2025.131676","DOIUrl":"10.1016/j.optcom.2025.131676","url":null,"abstract":"<div><div>To achieve high-power laser output with a low divergence angle, this study designs and fabricates a 730 nm high-power edge-emitting semiconductor laser array. The device incorporates GaAsP/AlGaInP highly strain-compensated quantum wells to achieve lasing at a wavelength of 730 nm. AlGaInP, a material with a wider bandgap than AlGaAs, is employed as the waveguide material to enhance carrier confinement within the active region effectively. The designed 730 nm semiconductor laser array delivers a single-chip output power of 10 W at the target wavelength while maintaining the low divergence angle typical of a 6 μm single-emitter array. Furthermore, it exhibits low power degradation even under high-temperature conditions. This laser array offers a robust solution for practical applications in high-power far-red laser illumination, optical imaging, and high-beam-quality laser systems.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"582 ","pages":"Article 131676"},"PeriodicalIF":2.2,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552095","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 : 2025-02-26DOI: 10.1016/j.optcom.2025.131629
Feihu Wang , Yafei Yu , Zhengjun Wei , Tianming Zhao , Jindong Wang
We propose a bit-oriented quantum blind signature protocol utilizing the single-qubit rotation. Within this scheme, message blinding and signing are achieved through qubit rotation, while message recovery and verification are accomplished via inverse rotation. The protocol primarily relies on quantum rotation operations, which are highly feasible with current technological capabilities. Moreover, by exploiting the multi-dimensional properties of qubits, the protocol allows each qubit to encode two classical bits, thereby enhancing coding efficiency. Consequently, this method reduces the complexity of the signature process, minimizes reliance on extensive quantum resources, and lowers implementation costs, positioning it as a promising candidate for practical applications.
{"title":"Quantum blind signature protocol based on single qubit rotation","authors":"Feihu Wang , Yafei Yu , Zhengjun Wei , Tianming Zhao , Jindong Wang","doi":"10.1016/j.optcom.2025.131629","DOIUrl":"10.1016/j.optcom.2025.131629","url":null,"abstract":"<div><div>We propose a bit-oriented quantum blind signature protocol utilizing the single-qubit rotation. Within this scheme, message blinding and signing are achieved through qubit rotation, while message recovery and verification are accomplished via inverse rotation. The protocol primarily relies on quantum rotation operations, which are highly feasible with current technological capabilities. Moreover, by exploiting the multi-dimensional properties of qubits, the protocol allows each qubit to encode two classical bits, thereby enhancing coding efficiency. Consequently, this method reduces the complexity of the signature process, minimizes reliance on extensive quantum resources, and lowers implementation costs, positioning it as a promising candidate for practical applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131629"},"PeriodicalIF":2.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552035","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}
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