In this letter, we report a high performance long-wave infrared (LWIR, $lambda = 8$ -$12~mu $ m) quantum cascade laser (QCL) emitting at $9.0~mu $ m. The effects of cavity dimensions on the performance of buried heterostructure (BH) narrow-ridge lasers are investigated, along with an analysis of their thermal characteristics. Longer cavities result in lower slope efficiency ($boldsymbol {eta }$ ), but reduced local heat density, enabling the laser to achieve higher continuous-wave (CW) output power at higher operating temperatures. At 288 K, a 5 mm-long cavity, $15.0~mu $ m-wide ridge laser exhibits a $boldsymbol {eta }$ of 2.11 W/A and a CW output power of 2.18 W, which are 22% lower and 54% higher, respectively, than those of a laser with 3 mm-long cavity. Narrower ridges reduce self-heating effects, leading to only a slight decrease in output power but a significant increase in wall plug efficiency (WPE). A 5 mm-long cavity, $11.0~mu $ m-wide ridge laser demonstrates a CW output power of 2.08 W and a WPE of 9.80%, which are 5% lower and 19% higher, respectively, compared to those of a $15~mu $ m-wide ridge laser. The $11.0~mu $ m-wide ridge laser maintains excellent beam quality across the entire operating range, whereas the $15.0~mu $ m-wide ridge laser exhibits degradation under high current injection.
{"title":"Effects of Cavity Dimensions on High Performance LWIR Quantum Cascade Lasers Emitting at 9 μm","authors":"Yuan Ma;Yuzhe Lin;Chenyang Wan;Zixian Wang;Xuyan Zhou;Fengxin Dong;Jinchuan Zhang;Fengqi Liu;Wanhua Zheng","doi":"10.1109/LPT.2025.3527022","DOIUrl":"https://doi.org/10.1109/LPT.2025.3527022","url":null,"abstract":"In this letter, we report a high performance long-wave infrared (LWIR, <inline-formula> <tex-math>$lambda = 8$ </tex-math></inline-formula>-<inline-formula> <tex-math>$12~mu $ </tex-math></inline-formula> m) quantum cascade laser (QCL) emitting at <inline-formula> <tex-math>$9.0~mu $ </tex-math></inline-formula> m. The effects of cavity dimensions on the performance of buried heterostructure (BH) narrow-ridge lasers are investigated, along with an analysis of their thermal characteristics. Longer cavities result in lower slope efficiency (<inline-formula> <tex-math>$boldsymbol {eta }$ </tex-math></inline-formula>), but reduced local heat density, enabling the laser to achieve higher continuous-wave (CW) output power at higher operating temperatures. At 288 K, a 5 mm-long cavity, <inline-formula> <tex-math>$15.0~mu $ </tex-math></inline-formula> m-wide ridge laser exhibits a <inline-formula> <tex-math>$boldsymbol {eta }$ </tex-math></inline-formula> of 2.11 W/A and a CW output power of 2.18 W, which are 22% lower and 54% higher, respectively, than those of a laser with 3 mm-long cavity. Narrower ridges reduce self-heating effects, leading to only a slight decrease in output power but a significant increase in wall plug efficiency (WPE). A 5 mm-long cavity, <inline-formula> <tex-math>$11.0~mu $ </tex-math></inline-formula> m-wide ridge laser demonstrates a CW output power of 2.08 W and a WPE of 9.80%, which are 5% lower and 19% higher, respectively, compared to those of a <inline-formula> <tex-math>$15~mu $ </tex-math></inline-formula> m-wide ridge laser. The <inline-formula> <tex-math>$11.0~mu $ </tex-math></inline-formula> m-wide ridge laser maintains excellent beam quality across the entire operating range, whereas the <inline-formula> <tex-math>$15.0~mu $ </tex-math></inline-formula> m-wide ridge laser exhibits degradation under high current injection.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 4","pages":"215-218"},"PeriodicalIF":2.3,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We have developed a photonic filter featuring dual independently tunable passbands. Employing the reconstruction equivalent-chirp technique, we designed linearly chirped sampled Bragg gratings with two equivalent phase shifts positioned at 1/3 and 2/3 of the cavity, thus introducing two passbands in the $+ 1^{text {st}}$ channel. Leveraging the significant thermo-optic effect of silicon, dual-band tuning is achieved via micro-heaters integrated on the chip surface. By tuning the injection currents ranging from 0 to 35 mA into the micro-heaters, the filter exhibits a wide range of dual-wavelength filtering performance, with the frequency interval between the two passbands adjustable from 37.2 GHz to 186.1 GHz.
{"title":"Dual-Band Photonic Filters With Wide Tunable Range Using Chirped Sampled Gratings","authors":"Simeng Zhu;Bocheng Yuan;Weiqing Cheng;Yizhe Fan;Yiming Sun;Mohanad Al-Rubaiee;Jehan Akbar;John Marsh;Lianping Hou","doi":"10.1109/LPT.2025.3525549","DOIUrl":"https://doi.org/10.1109/LPT.2025.3525549","url":null,"abstract":"We have developed a photonic filter featuring dual independently tunable passbands. Employing the reconstruction equivalent-chirp technique, we designed linearly chirped sampled Bragg gratings with two equivalent phase shifts positioned at 1/3 and 2/3 of the cavity, thus introducing two passbands in the \u0000<inline-formula> <tex-math>$+ 1^{text {st}}$ </tex-math></inline-formula>\u0000 channel. Leveraging the significant thermo-optic effect of silicon, dual-band tuning is achieved via micro-heaters integrated on the chip surface. By tuning the injection currents ranging from 0 to 35 mA into the micro-heaters, the filter exhibits a wide range of dual-wavelength filtering performance, with the frequency interval between the two passbands adjustable from 37.2 GHz to 186.1 GHz.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"169-172"},"PeriodicalIF":2.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We accomplish a compact 150-MHz figure-9 Er:fiber laser through the use of a hybrid device of wavelength division multiplexer and phase shifter. By combining the time-independent rate equation and nonlinear Schrödinger equation, evolution of the intracavity field towards stable mode locking state is presented. We further quantify the output characteristics of the 150-MHz figure-9 laser. Explicitly, 5.8-mW average power, center wavelength of 1561.2 nm and 3-dB spectral bandwidth of 29.2 nm are obtained. More importantly, an integrated root-mean-square relative intensity noise of 0.0016% [1 Hz, 1 MHz] and 75.8 fs timing jitter [100 Hz, 1 MHz] are measured at the fundamental repetition rate. Moreover, by referencing to a stable radio frequency, the fundamental repetition rate is locked with an in-loop relative instability of $2.78times 10^{-12}$ at 1-s gate time.
{"title":"150 MHz, All-Polarization-Maintaining Fiber Integrated Figure-9 Femtosecond Laser","authors":"Haihao Cheng;Zhao Zhang;Xiaohong Hu;Ting Zhang;Ran Pan;Jing Jia;Yishan Wang;Shun Wu","doi":"10.1109/LPT.2024.3523958","DOIUrl":"https://doi.org/10.1109/LPT.2024.3523958","url":null,"abstract":"We accomplish a compact 150-MHz figure-9 Er:fiber laser through the use of a hybrid device of wavelength division multiplexer and phase shifter. By combining the time-independent rate equation and nonlinear Schrödinger equation, evolution of the intracavity field towards stable mode locking state is presented. We further quantify the output characteristics of the 150-MHz figure-9 laser. Explicitly, 5.8-mW average power, center wavelength of 1561.2 nm and 3-dB spectral bandwidth of 29.2 nm are obtained. More importantly, an integrated root-mean-square relative intensity noise of 0.0016% [1 Hz, 1 MHz] and 75.8 fs timing jitter [100 Hz, 1 MHz] are measured at the fundamental repetition rate. Moreover, by referencing to a stable radio frequency, the fundamental repetition rate is locked with an in-loop relative instability of \u0000<inline-formula> <tex-math>$2.78times 10^{-12}$ </tex-math></inline-formula>\u0000 at 1-s gate time.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"165-168"},"PeriodicalIF":2.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We fabricated various optical devices on a hybrid Si3N4–LiNbO3 platform for integrated quantum photonic circuits and observed Hong-Ou–Mandel (HOM) quantum interference. Strip-loaded waveguides were prepared via Si3N4 deposition on LiNbO3. Consequently, fundamental building blocks for quantum photonics, such as ring resonators, various beam splitters, and Mach-Zehnder interferometers, were fabricated and tested. Using 50:50 beam splitters, we observed HOM quantum interference and achieved a visibility of $96.6~pm ~1.2$ % after the subtraction of accidental counts. More advanced quantum-integrated devices are expected to be realized using the proposed hybrid platform.
{"title":"Classical and Quantum Experiments Using Hybrid Si3N₄-LiNbO₃ Photonic Chip","authors":"Hyungjun Heo;Kiwon Kwon;Donghwa Lee;Hyeong-Soon Jang;Sangin Kim;Heedeuk Shin;Yong-Su Kim;Sang-Wook Han;Hojoong Jung","doi":"10.1109/LPT.2024.3525396","DOIUrl":"https://doi.org/10.1109/LPT.2024.3525396","url":null,"abstract":"We fabricated various optical devices on a hybrid Si3N4–LiNbO3 platform for integrated quantum photonic circuits and observed Hong-Ou–Mandel (HOM) quantum interference. Strip-loaded waveguides were prepared via Si3N4 deposition on LiNbO3. Consequently, fundamental building blocks for quantum photonics, such as ring resonators, various beam splitters, and Mach-Zehnder interferometers, were fabricated and tested. Using 50:50 beam splitters, we observed HOM quantum interference and achieved a visibility of \u0000<inline-formula> <tex-math>$96.6~pm ~1.2$ </tex-math></inline-formula>\u0000% after the subtraction of accidental counts. More advanced quantum-integrated devices are expected to be realized using the proposed hybrid platform.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"173-176"},"PeriodicalIF":2.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142940781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
High coupling efficiency with passive alignment of cylindrical microlens fiber fabricated by photocurable resin with simple process to achieve desired lens structure is presented. Optimal lens dimensions of 4- $mu $ m upper base, 9- $mu $ m lower base, and 12- $mu $ m height were determined by simulation software. Despite mode conversion losses, maximum coupling efficiency reached 71.2%. Experimental results closely matched simulations of 67.6% coupling efficiency. A $1.5~mu $ m offset in the X-Y plane, defined within a Cartesian coordinate system, resulted in a measured 3-dB efficiency drop. Compared to microlens fiber with grinding processes, the microlens fibers offer improved efficiency and tolerance. The proposed microlens fibers with array setups could reduce alignment time and cost during packaging, suggesting applications in silicon light modules, optical radar, and biomedical measurements.
{"title":"Innovative Photocurable Resin-Based Cylindrical Microlens Fiber for Silicon Photonics Coupling","authors":"Chien-Wei Huang;Kai-Chieh Chang;Po-Lin Huang;Zhi Ting Ye;Chun-Nien Liu;Wood-Hi Cheng","doi":"10.1109/LPT.2024.3524274","DOIUrl":"https://doi.org/10.1109/LPT.2024.3524274","url":null,"abstract":"High coupling efficiency with passive alignment of cylindrical microlens fiber fabricated by photocurable resin with simple process to achieve desired lens structure is presented. Optimal lens dimensions of 4-\u0000<inline-formula> <tex-math>$mu $ </tex-math></inline-formula>\u0000m upper base, 9-\u0000<inline-formula> <tex-math>$mu $ </tex-math></inline-formula>\u0000m lower base, and 12-\u0000<inline-formula> <tex-math>$mu $ </tex-math></inline-formula>\u0000m height were determined by simulation software. Despite mode conversion losses, maximum coupling efficiency reached 71.2%. Experimental results closely matched simulations of 67.6% coupling efficiency. A \u0000<inline-formula> <tex-math>$1.5~mu $ </tex-math></inline-formula>\u0000m offset in the X-Y plane, defined within a Cartesian coordinate system, resulted in a measured 3-dB efficiency drop. Compared to microlens fiber with grinding processes, the microlens fibers offer improved efficiency and tolerance. The proposed microlens fibers with array setups could reduce alignment time and cost during packaging, suggesting applications in silicon light modules, optical radar, and biomedical measurements.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"177-180"},"PeriodicalIF":2.3,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142940918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-30DOI: 10.1109/LPT.2024.3523915
Hualong Ye;Daidou Guo
In previous studies of ghost imaging transmission methods, the influence of real transmission channel on communication quality is weakened to a certain extent. Therefore, in this letter, a channel transmission model in real scenes (Rayleigh fading channel) is introduced. By leveraging the ultra-strong anti-noise capability and weak-signal imaging characteristics of ghost imaging, we explore ways to enhance the transmission of information while minimizing channel interference. Through the analysis of metrics such as bit error rate (BER), structural similarity (SSIM) and peak signal-to-noise ratio (PSNR), the proposed method effectively addresses issues like low restoration accuracy and limited feasibility of current transmission imaging methods, providing a new imaging technology for the research in the field of image transmission and holding significant theoretical value.
{"title":"Research on Information Reconstruction Mechanism of Ghost Imaging Based on Rayleigh Fading Channel","authors":"Hualong Ye;Daidou Guo","doi":"10.1109/LPT.2024.3523915","DOIUrl":"https://doi.org/10.1109/LPT.2024.3523915","url":null,"abstract":"In previous studies of ghost imaging transmission methods, the influence of real transmission channel on communication quality is weakened to a certain extent. Therefore, in this letter, a channel transmission model in real scenes (Rayleigh fading channel) is introduced. By leveraging the ultra-strong anti-noise capability and weak-signal imaging characteristics of ghost imaging, we explore ways to enhance the transmission of information while minimizing channel interference. Through the analysis of metrics such as bit error rate (BER), structural similarity (SSIM) and peak signal-to-noise ratio (PSNR), the proposed method effectively addresses issues like low restoration accuracy and limited feasibility of current transmission imaging methods, providing a new imaging technology for the research in the field of image transmission and holding significant theoretical value.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 5","pages":"309-312"},"PeriodicalIF":2.3,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-27DOI: 10.1109/LPT.2024.3523367
Yiheng Fan;Hao Xiu;Zhijin Xiong;Wei Lin;Xuewen Chen;Tianxi Wang;Xu Hu;Xiaoming Wei;Zhongmin Yang
In this letter, we present beam quality improvement in a 50-W-class nonlinear chirped pulse amplification (NCPA) femtosecond all-fiber system. By exploring the group delay dispersion management, we manipulate the nonlinear spectrum broadening, which can not only alleviate the spatial deterioration caused by fundamental mode saturation, but also enable significant pulse compression under the influence of the soliton effect. This work offers insight into the design of the NCPA all-fiber laser system, providing guidelines on simultaneously realizing good beam quality and ultrashort pulses.
{"title":"Improving the Beam Quality in a High-Power Femtosecond All-Fiber System","authors":"Yiheng Fan;Hao Xiu;Zhijin Xiong;Wei Lin;Xuewen Chen;Tianxi Wang;Xu Hu;Xiaoming Wei;Zhongmin Yang","doi":"10.1109/LPT.2024.3523367","DOIUrl":"https://doi.org/10.1109/LPT.2024.3523367","url":null,"abstract":"In this letter, we present beam quality improvement in a 50-W-class nonlinear chirped pulse amplification (NCPA) femtosecond all-fiber system. By exploring the group delay dispersion management, we manipulate the nonlinear spectrum broadening, which can not only alleviate the spatial deterioration caused by fundamental mode saturation, but also enable significant pulse compression under the influence of the soliton effect. This work offers insight into the design of the NCPA all-fiber laser system, providing guidelines on simultaneously realizing good beam quality and ultrashort pulses.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"161-164"},"PeriodicalIF":2.3,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142975924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-25DOI: 10.1109/LPT.2024.3522239
Omnia Nawwar;Kaoru Minoshima;Naoya Kuse
Ultrafast physical random bit generators (RBGs) underpin numerous critical applications, from secure communications to computational simulations. Microresonator-based frequency combs in a chaotic state have emerged as a promising source of high-speed random bit sequences, as each comb tooth acts as an independent random bit source. This letter presents the effect of different chaotic comb characteristics on the RBG rate. A parametric study based on the Lugiato-Lefever Equation (LLE) has been implemented to study the effect of RF bandwidth, optical bandwidth (depending on the pump power and linewidth of a microresonator), and sampling rate on the generation rate. By analyzing these results, we establish guidelines for choosing the comb parameters that maximize bit generation rates.
{"title":"Parametric Study of Chaotic Combs for High-Rate Random Number Generation","authors":"Omnia Nawwar;Kaoru Minoshima;Naoya Kuse","doi":"10.1109/LPT.2024.3522239","DOIUrl":"https://doi.org/10.1109/LPT.2024.3522239","url":null,"abstract":"Ultrafast physical random bit generators (RBGs) underpin numerous critical applications, from secure communications to computational simulations. Microresonator-based frequency combs in a chaotic state have emerged as a promising source of high-speed random bit sequences, as each comb tooth acts as an independent random bit source. This letter presents the effect of different chaotic comb characteristics on the RBG rate. A parametric study based on the Lugiato-Lefever Equation (LLE) has been implemented to study the effect of RF bandwidth, optical bandwidth (depending on the pump power and linewidth of a microresonator), and sampling rate on the generation rate. By analyzing these results, we establish guidelines for choosing the comb parameters that maximize bit generation rates.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"153-156"},"PeriodicalIF":2.3,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142918529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this letter, we conduct an experiment of quantum noise stream cipher scheme based on 3-channel-QAM mapping and DFTs-OFDM in optical back-to-back and 160km standard single mode fiber. The fusion of 3D mapping and DFTs-OFDM offers sufficient security for QAM/QNSC within the dual polarization I/Q modulator system. Notably, the proposed 3D-mapping approach demonstrates improved minimum Euclidean distance and bit error rate performance compared to conventional 2D mapping. Experimental results confirm that our 3-channel-QAM/QNSC system achieves better transmission and higher security performance at the same base length than conventional QAM/QNSC.
{"title":"Quantum Noise Stream Cipher Scheme Based on 3-Channel-QAM With 3D Mapping and DFTs-OFDM","authors":"Mingrui Zhang;Yajie Li;Shuang Wei;Haokun Song;Yixin Wang;Yongli Zhao;Jie Zhang","doi":"10.1109/LPT.2024.3512195","DOIUrl":"https://doi.org/10.1109/LPT.2024.3512195","url":null,"abstract":"In this letter, we conduct an experiment of quantum noise stream cipher scheme based on 3-channel-QAM mapping and DFTs-OFDM in optical back-to-back and 160km standard single mode fiber. The fusion of 3D mapping and DFTs-OFDM offers sufficient security for QAM/QNSC within the dual polarization I/Q modulator system. Notably, the proposed 3D-mapping approach demonstrates improved minimum Euclidean distance and bit error rate performance compared to conventional 2D mapping. Experimental results confirm that our 3-channel-QAM/QNSC system achieves better transmission and higher security performance at the same base length than conventional QAM/QNSC.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"141-144"},"PeriodicalIF":2.3,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We propose and experimentally demonstrate an ultrasensitive strain sensor based on a V-groove structure long-period fiber grating (V-LPFG). The V-LPFG is fabricated by using CO2 laser to etch periodic V-groove structures on a standard single-mode fiber. Utilizing the periodic V-grooves, effectively enhancing the strain sensitivity of LPFG. The effect of different V-groove depths on the strain sensitivity of V-LPFG are discussed. The experiment results show that the sensitivity of strain is up to -229.1 pm/ $mu varepsilon $ . In addition, the temperature response of the sensor is measured and the temperature sensitivity is 80.18 pm/°C. Its temperature-strain cross-sensitivity is as low as - $0.35mu varepsilon $ /°C. The proposed ultrasensitive strain sensor has the good potential applications in engineering health monitoring and precision measurement due to its low cost, small size, simple fabrication, and high sensitivity.
{"title":"Ultrasensitive Strain Sensor Based on V-Groove Structure Long-Period Fiber Grating","authors":"Taian Yin;Xuelan He;Jing Yang;Yuan Jin;Yan Liu;Shan Gao;Peng Ye;Jinhui Shi;Libo Yuan;Chunying Guan","doi":"10.1109/LPT.2024.3520812","DOIUrl":"https://doi.org/10.1109/LPT.2024.3520812","url":null,"abstract":"We propose and experimentally demonstrate an ultrasensitive strain sensor based on a V-groove structure long-period fiber grating (V-LPFG). The V-LPFG is fabricated by using CO2 laser to etch periodic V-groove structures on a standard single-mode fiber. Utilizing the periodic V-grooves, effectively enhancing the strain sensitivity of LPFG. The effect of different V-groove depths on the strain sensitivity of V-LPFG are discussed. The experiment results show that the sensitivity of strain is up to -229.1 pm/\u0000<inline-formula> <tex-math>$mu varepsilon $ </tex-math></inline-formula>\u0000. In addition, the temperature response of the sensor is measured and the temperature sensitivity is 80.18 pm/°C. Its temperature-strain cross-sensitivity is as low as -\u0000<inline-formula> <tex-math>$0.35mu varepsilon $ </tex-math></inline-formula>\u0000/°C. The proposed ultrasensitive strain sensor has the good potential applications in engineering health monitoring and precision measurement due to its low cost, small size, simple fabrication, and high sensitivity.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"133-136"},"PeriodicalIF":2.3,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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