Pub Date : 2025-01-17DOI: 10.1109/LPT.2025.3531044
Ming Zhou;Dengyu Shan;Jiaheng Gong;Haiyang Huang;Wei Li
This article used far-field light source to investigate the focal length of the short focal length, multifocal metalens. The feasibility of the scheme was analyzed by using imaging simulation. In addition, the relative error between far-field imaging method and collimated laser measurement was analyzed. The data results show that the relative error is 0.49%, as the point light source located 2000mm away, for ideal test lens with focal length of 10mm. An optical system composed of double lenses was constructed to measure the focal length of a metasurface with four focal points. The experimental results show that the system can determine the focal position within a step of 0.1mm.
{"title":"Focal-Length Measurement of Multifocal Metalens by Using Far-Field Imaging","authors":"Ming Zhou;Dengyu Shan;Jiaheng Gong;Haiyang Huang;Wei Li","doi":"10.1109/LPT.2025.3531044","DOIUrl":"https://doi.org/10.1109/LPT.2025.3531044","url":null,"abstract":"This article used far-field light source to investigate the focal length of the short focal length, multifocal metalens. The feasibility of the scheme was analyzed by using imaging simulation. In addition, the relative error between far-field imaging method and collimated laser measurement was analyzed. The data results show that the relative error is 0.49%, as the point light source located 2000mm away, for ideal test lens with focal length of 10mm. An optical system composed of double lenses was constructed to measure the focal length of a metasurface with four focal points. The experimental results show that the system can determine the focal position within a step of 0.1mm.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 4","pages":"219-222"},"PeriodicalIF":2.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105837","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}
Presents corrections to the paper, Neural Network Ensemble for Precise Laser Spot Position Determination on a Quadrant Detector.
对论文《四象限探测器激光光斑精确定位的神经网络集成》进行了修正。
{"title":"Corrections to “Neural Network Ensemble for Precise Laser Spot Position Determination on a Quadrant Detector”","authors":"Micah Baleya;Hossam Shalaby;Kazutoshi Kato;Maha Elsabrouty","doi":"10.1109/LPT.2025.3525856","DOIUrl":"https://doi.org/10.1109/LPT.2025.3525856","url":null,"abstract":"Presents corrections to the paper, Neural Network Ensemble for Precise Laser Spot Position Determination on a Quadrant Detector.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 3","pages":"181-181"},"PeriodicalIF":2.3,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10842273","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
New effective amplification solutions are required to extend existing network architectures for data center interconnect (DCI) beyond the C band. We implement a new multiband amplification solution for DCI application by employing a single seamless ultra-wideband SOA to amplify both C and L bands. We evaluate its transmission performance, including system nonlinear impairments, by testing three different input power spectra and three distinct span losses. We demonstrate a total real-time throughput of 67.2 Tbit/s over a transmission span of 100 km standard single-mode fiber with a total span loss of 25 dB.
{"title":"67.2 Tbit/s Real-Time DCI Transmission Demonstration Using Single Seamless SOA","authors":"Xiaohui Zhao;Chenyu Sun;Abel Lorences-Riesgo;Loig Godard;Hartmut Hafermann;Massimo Tornatore;Romain Brenot;Yann Frignac;Gabriel Charlet","doi":"10.1109/LPT.2025.3530100","DOIUrl":"https://doi.org/10.1109/LPT.2025.3530100","url":null,"abstract":"New effective amplification solutions are required to extend existing network architectures for data center interconnect (DCI) beyond the C band. We implement a new multiband amplification solution for DCI application by employing a single seamless ultra-wideband SOA to amplify both C and L bands. We evaluate its transmission performance, including system nonlinear impairments, by testing three different input power spectra and three distinct span losses. We demonstrate a total real-time throughput of 67.2 Tbit/s over a transmission span of 100 km standard single-mode fiber with a total span loss of 25 dB.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 4","pages":"199-202"},"PeriodicalIF":2.3,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105841","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 : 2025-01-15DOI: 10.1109/LPT.2025.3530299
Luis M. Valentín-Coronado;Rodolfo Martínez-Manuel;Jonathan Esquivel-Hernández;Silvia Diaz;Maria de Los Ángeles Martínez-Guerrero;Miguel Ángel Armendáriz;Sophie LaRochelle
A vector-based pattern recognition algorithm (V-PRA) for interferometric fiber sensor (IFS) signals is introduced. The proposed V-PRA transforms sensed interferometric signals into vectors to identify them by calculating the angular similarity with reference database vectors. This process accurately recognizes sensing patterns and assigns corresponding physical parameter values. The algorithm’s performance was tested in various IFS systems, including Fabry-Perot interferometers for refractive index measurement, multimode IFS for bending and strain monitoring, and multicore IFS for temperature monitoring. Experimental results confirm the effectiveness of the V-PRA as a specialized tool for IFSs.
{"title":"Vector-Based Pattern Recognition Algorithm for Interferometric Fiber Sensor-Signals Analysis","authors":"Luis M. Valentín-Coronado;Rodolfo Martínez-Manuel;Jonathan Esquivel-Hernández;Silvia Diaz;Maria de Los Ángeles Martínez-Guerrero;Miguel Ángel Armendáriz;Sophie LaRochelle","doi":"10.1109/LPT.2025.3530299","DOIUrl":"https://doi.org/10.1109/LPT.2025.3530299","url":null,"abstract":"A vector-based pattern recognition algorithm (V-PRA) for interferometric fiber sensor (IFS) signals is introduced. The proposed V-PRA transforms sensed interferometric signals into vectors to identify them by calculating the angular similarity with reference database vectors. This process accurately recognizes sensing patterns and assigns corresponding physical parameter values. The algorithm’s performance was tested in various IFS systems, including Fabry-Perot interferometers for refractive index measurement, multimode IFS for bending and strain monitoring, and multicore IFS for temperature monitoring. Experimental results confirm the effectiveness of the V-PRA as a specialized tool for IFSs.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 4","pages":"207-210"},"PeriodicalIF":2.3,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105917","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 : 2025-01-14DOI: 10.1109/LPT.2025.3529601
Jing Meng;Sijing Liang;Ian A. Davidson;Gregory T. Jasion;Natalie Wheeler;Francesco Poletti;Lin Xu;David J. Richardson;Yongmin Jung
We present a compact and efficient method for directly coupling a near-ultraviolet laser diode with high beam ellipticity to a hollow core fiber (HCF) using an all-fiber mode field diameter (MFD) converter. This MFD converter, approximately 1 mm in length and composed of graded-index fiber (GIF) and coreless fiber (CSF), effectively addresses the MFD mismatch between the laser diode and HCF through image magnification. As a proof of concept, we tested a 405 nm laser diode with a beam ellipticity of 2.37. Simulations predicted a coupling efficiency of ~80%, and we achieved 67% experimentally. Additionally, we introduced an elliptic GIF to further enhance coupling efficiency for highly elliptical beams, leading to a significant performance improvement.
{"title":"High Efficiency Butt-Coupling of a 405-nm Laser Diode to Hollow Core Fiber","authors":"Jing Meng;Sijing Liang;Ian A. Davidson;Gregory T. Jasion;Natalie Wheeler;Francesco Poletti;Lin Xu;David J. Richardson;Yongmin Jung","doi":"10.1109/LPT.2025.3529601","DOIUrl":"https://doi.org/10.1109/LPT.2025.3529601","url":null,"abstract":"We present a compact and efficient method for directly coupling a near-ultraviolet laser diode with high beam ellipticity to a hollow core fiber (HCF) using an all-fiber mode field diameter (MFD) converter. This MFD converter, approximately 1 mm in length and composed of graded-index fiber (GIF) and coreless fiber (CSF), effectively addresses the MFD mismatch between the laser diode and HCF through image magnification. As a proof of concept, we tested a 405 nm laser diode with a beam ellipticity of 2.37. Simulations predicted a coupling efficiency of ~80%, and we achieved 67% experimentally. Additionally, we introduced an elliptic GIF to further enhance coupling efficiency for highly elliptical beams, leading to a significant performance improvement.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 4","pages":"211-214"},"PeriodicalIF":2.3,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105916","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 : 2025-01-14DOI: 10.1109/LPT.2025.3529767
Pritika Singh;Tejendra Dixit;Vipul Singh
In this study, we report a high-quality ZnO thin film synthesized using the sol-gel method for developing a spectrally selective UV photodetector with enhanced detectivity and LDR. The effect of varying precursor concentrations from 1 M to 3 M was systematically examined, with 3 M identified as the optimal concentration. The 3 M ZnO thin film-based planar Ag/ZnO/Ag Metal-Semiconductor-Metal (MSM) structure device has demonstrated dominant photosensitivity of $2.2times 10^{6}$ at 350 nm (UV-A) radiation and 20 V applied bias. Additionally, the device exhibited a maximum responsivity of 43 A/W with a full width at half maxima (FWHM) of 38 nm, detectivity of $7.4times 10^{13}$ Jones, external quantum efficiency (EQE) of 15444%, and a linear dynamic range (LDR) of 112 dB at 350 nm (UV-A) radiation and 20 V applied bias. This work presents a cost-effective alternative to traditional methods, highlighting the strong potential of the 3 M ZnO thin film for advanced UV photodetector applications.
{"title":"UV-A Selective ZnO Thin-Film Based Photosensor With Enhanced Detectivity and Linear Dynamic Range","authors":"Pritika Singh;Tejendra Dixit;Vipul Singh","doi":"10.1109/LPT.2025.3529767","DOIUrl":"https://doi.org/10.1109/LPT.2025.3529767","url":null,"abstract":"In this study, we report a high-quality ZnO thin film synthesized using the sol-gel method for developing a spectrally selective UV photodetector with enhanced detectivity and LDR. The effect of varying precursor concentrations from 1 M to 3 M was systematically examined, with 3 M identified as the optimal concentration. The 3 M ZnO thin film-based planar Ag/ZnO/Ag Metal-Semiconductor-Metal (MSM) structure device has demonstrated dominant photosensitivity of <inline-formula> <tex-math>$2.2times 10^{6}$ </tex-math></inline-formula> at 350 nm (UV-A) radiation and 20 V applied bias. Additionally, the device exhibited a maximum responsivity of 43 A/W with a full width at half maxima (FWHM) of 38 nm, detectivity of <inline-formula> <tex-math>$7.4times 10^{13}$ </tex-math></inline-formula> Jones, external quantum efficiency (EQE) of 15444%, and a linear dynamic range (LDR) of 112 dB at 350 nm (UV-A) radiation and 20 V applied bias. This work presents a cost-effective alternative to traditional methods, highlighting the strong potential of the 3 M ZnO thin film for advanced UV photodetector applications.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 4","pages":"203-206"},"PeriodicalIF":2.3,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105918","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 a digital-differential-pulse-code-modulation fronthaul (DDP-FH) scheme and conduct experimental validation within a photonics-aided D-band 1.2-km wireless fronthaul system. In the experiment, by adopting different resolutions in differential-pulse-code-modulation (DPCM), the recovered signal-to-noise ratio (SNR) can be flexibly adjusted within a wide range from 19.1 dB to 38.9 dB, supporting the transmission of various formats from 64-quadrature-amplitude-modulation (64-QAM) to 4096-QAM. When the resolution of DPCM increases from 2 to 6 bit, the DDP-FH scheme achieves an average SNR gain of 5 dB for each linearly increased bandwidth (BW). Notably, compared to digital-pulse-code-modulation fronthaul (DP-FH), DDP-FH reduces the required bandwidth by approximately $1.3cdot $ BW while maintaining the same SNR.
我们提出了一种数字差分脉冲编码调制前传（DDP-FH）方案，并在光子辅助的d波段1.2 km无线前传系统中进行了实验验证。在实验中，通过差分脉冲编码调制（DPCM）中采用不同的分辨率，恢复的信噪比（SNR）可以在19.1 dB ~ 38.9 dB的宽范围内灵活调节，支持64-QAM ~ 4096-QAM等多种格式的传输。当DPCM的分辨率从2位增加到6位时，DDP-FH方案每增加一个线性带宽（BW），平均信噪比增益为5 dB。值得注意的是，与数字脉冲编码调制前传（DP-FH）相比，DP-FH在保持相同信噪比的情况下，所需带宽减少了约1.3美元。
{"title":"Demonstration of 1.2-km D-Band Wireless Fronthaul Using Digital-Differential-PCM Scheme","authors":"Mingxu Wang;Jianjun Yu;Xianming Zhao;Xiongwei Yang;Yi Wei;Chengzhen Bian;Yang Han;Peng Tian;Sicong Xu;Wen Zhou;Kaihui Wang;Weiping Li","doi":"10.1109/LPT.2025.3528329","DOIUrl":"https://doi.org/10.1109/LPT.2025.3528329","url":null,"abstract":"We propose a digital-differential-pulse-code-modulation fronthaul (DDP-FH) scheme and conduct experimental validation within a photonics-aided D-band 1.2-km wireless fronthaul system. In the experiment, by adopting different resolutions in differential-pulse-code-modulation (DPCM), the recovered signal-to-noise ratio (SNR) can be flexibly adjusted within a wide range from 19.1 dB to 38.9 dB, supporting the transmission of various formats from 64-quadrature-amplitude-modulation (64-QAM) to 4096-QAM. When the resolution of DPCM increases from 2 to 6 bit, the DDP-FH scheme achieves an average SNR gain of 5 dB for each linearly increased bandwidth (BW). Notably, compared to digital-pulse-code-modulation fronthaul (DP-FH), DDP-FH reduces the required bandwidth by approximately <inline-formula> <tex-math>$1.3cdot $ </tex-math></inline-formula>BW while maintaining the same SNR.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 4","pages":"183-186"},"PeriodicalIF":2.3,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142993871","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 fabricate a novel ring-core Ytterbium-doped fiber (RCYDF) with a depressed inner core. The experiment demonstrates that the fiber could effectively increase the mode competitiveness of the LP11 mode while attenuating the fundamental (LP01) mode. Meanwhile, we propose the overlap factor ratio (OFR) to characterize the mode competitiveness of the high-order core (LP11) mode. Based on this fiber, the cylindrical vector beams (CVBs) are generated at 1062.34 nm with a high efficiency of 63.35%. The output of radially polarized (TM01) and azimuthally polarized (TE01) beams are achieved with high-mode-purity of 94.7% and 93.2%, respectively. The CVB fiber laser has great potential application in surface plasmon excitation and laser material processing.
{"title":"High-Efficiency High-Mode-Purity Cylindrical Vector Beam Based on Ring-Core Yb-Doped Fiber","authors":"Dandan Liu;Wei Chen;Fei Wang;Jianao Peng;Xianglong Zeng;Lixin Xu;Jianxiang Wen;Xiaobei Zhang;Fufei Pang;Tingyun Wang","doi":"10.1109/LPT.2025.3528345","DOIUrl":"https://doi.org/10.1109/LPT.2025.3528345","url":null,"abstract":"We propose and fabricate a novel ring-core Ytterbium-doped fiber (RCYDF) with a depressed inner core. The experiment demonstrates that the fiber could effectively increase the mode competitiveness of the LP11 mode while attenuating the fundamental (LP01) mode. Meanwhile, we propose the overlap factor ratio (OFR) to characterize the mode competitiveness of the high-order core (LP11) mode. Based on this fiber, the cylindrical vector beams (CVBs) are generated at 1062.34 nm with a high efficiency of 63.35%. The output of radially polarized (TM01) and azimuthally polarized (TE01) beams are achieved with high-mode-purity of 94.7% and 93.2%, respectively. The CVB fiber laser has great potential application in surface plasmon excitation and laser material processing.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 4","pages":"187-190"},"PeriodicalIF":2.3,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142993788","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 : 2025-01-10DOI: 10.1109/LPT.2025.3528338
Haoyun Zhang;Xuecheng Wu;Dongyuan Li;Yafei Meng;Shining Zhu;Fengqiu Wang
Conventional electro-optic (EO) combs are known for their repetition-rate agility. However, due to a nonzero time delay between the driving signals for the cascaded phase and intensity modulators, such systems can rarely withstand multi-GHz tuning range while maintaining high-quality temporal shapes. In this letter, we establish that a diminishing modulator delay time is the single most important factor impacting the repetition-rate sweeping performance of a short-pulsed EO comb. By reducing the modulator delay time to zero, we demonstrate an EO comb that is capable of frequency sweeping across an ultrabroad frequency span (6-10 GHz) while consistently outputting high-quality $sim ~5$ ps pulses. Importantly, the ‘zero modulator delay time’ strategy inherently ensures phase matching for all frequencies and the limitation on sweeping speed is completely eliminated. The pulse duration and temporal shape are highly stable and reproducible, and the timing jitters are under 125 fs for all repetition rates within the tuning range. We also demonstrate wavelength-agility in such a system, by tuning the center wavelength of the seed semiconductor laser from 1535 to 1565 nm. Across the tuning range, optical signal-to-noise ratios of over 40 dB are achieved. This simple approach provides an effective solution for stabilizing the pulse duration for EO combs and may find applications in asynchronous optical sampling or other time-resolved experiments.
{"title":"Picosecond Electro-Optic Comb With Multi-GHz Repetition-Rate Sweeping Range","authors":"Haoyun Zhang;Xuecheng Wu;Dongyuan Li;Yafei Meng;Shining Zhu;Fengqiu Wang","doi":"10.1109/LPT.2025.3528338","DOIUrl":"https://doi.org/10.1109/LPT.2025.3528338","url":null,"abstract":"Conventional electro-optic (EO) combs are known for their repetition-rate agility. However, due to a nonzero time delay between the driving signals for the cascaded phase and intensity modulators, such systems can rarely withstand multi-GHz tuning range while maintaining high-quality temporal shapes. In this letter, we establish that a diminishing modulator delay time is the single most important factor impacting the repetition-rate sweeping performance of a short-pulsed EO comb. By reducing the modulator delay time to zero, we demonstrate an EO comb that is capable of frequency sweeping across an ultrabroad frequency span (6-10 GHz) while consistently outputting high-quality <inline-formula> <tex-math>$sim ~5$ </tex-math></inline-formula> ps pulses. Importantly, the ‘zero modulator delay time’ strategy inherently ensures phase matching for all frequencies and the limitation on sweeping speed is completely eliminated. The pulse duration and temporal shape are highly stable and reproducible, and the timing jitters are under 125 fs for all repetition rates within the tuning range. We also demonstrate wavelength-agility in such a system, by tuning the center wavelength of the seed semiconductor laser from 1535 to 1565 nm. Across the tuning range, optical signal-to-noise ratios of over 40 dB are achieved. This simple approach provides an effective solution for stabilizing the pulse duration for EO combs and may find applications in asynchronous optical sampling or other time-resolved experiments.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 4","pages":"191-194"},"PeriodicalIF":2.3,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142993789","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 : 2025-01-10DOI: 10.1109/LPT.2025.3528316
Jingzhan Shi;Yian Wang;Dan Zhu;Qiang Liu;Dongdong Lin;Na Zhang;Bindong Gao;Yiping Cui;Yiping Wang
Microwave photonic (MWP) frequency-modulated continuous-wave (FMCW) radars break through the bandwidth limitations of electronic radar by photonic frequency multiplication and mixing. However, it induces additional phase noise to the radar signal, which is undesirable for radar target detection and recognition. To deal with this issue, this letter presents and experimentally demonstrates a MWP FMCW radar with suppressed phase noise by equal phase interval sampling. The radar signal, of which the bandwidth is broadened by MWP frequency multiplier, is split into two paths. One path is delayed by optical fiber as a reference signal, and the other path is transmitted to free space and reflected by the target as an echo signal. The reference signal and the echo signal are de-chirped by mixing with the radar signal at an MWP mixer. The de-chirped reference signal is sampled with equal phase interval and the corresponding time are recorded, at which the de-chirped echo signal is sampled. The de-chirped echo signal with suppressed phase noise can be obtained by rearranging the re-sampled de-chirped echo signal with equal time interval. In the experiment, the validity of the proposed system is demonstrated.
{"title":"A Microwave Photonic FMCW Radar With Suppressed Phase Noise Based on Equal Phase Interval Sampling","authors":"Jingzhan Shi;Yian Wang;Dan Zhu;Qiang Liu;Dongdong Lin;Na Zhang;Bindong Gao;Yiping Cui;Yiping Wang","doi":"10.1109/LPT.2025.3528316","DOIUrl":"https://doi.org/10.1109/LPT.2025.3528316","url":null,"abstract":"Microwave photonic (MWP) frequency-modulated continuous-wave (FMCW) radars break through the bandwidth limitations of electronic radar by photonic frequency multiplication and mixing. However, it induces additional phase noise to the radar signal, which is undesirable for radar target detection and recognition. To deal with this issue, this letter presents and experimentally demonstrates a MWP FMCW radar with suppressed phase noise by equal phase interval sampling. The radar signal, of which the bandwidth is broadened by MWP frequency multiplier, is split into two paths. One path is delayed by optical fiber as a reference signal, and the other path is transmitted to free space and reflected by the target as an echo signal. The reference signal and the echo signal are de-chirped by mixing with the radar signal at an MWP mixer. The de-chirped reference signal is sampled with equal phase interval and the corresponding time are recorded, at which the de-chirped echo signal is sampled. The de-chirped echo signal with suppressed phase noise can be obtained by rearranging the re-sampled de-chirped echo signal with equal time interval. In the experiment, the validity of the proposed system is demonstrated.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 4","pages":"195-198"},"PeriodicalIF":2.3,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105919","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：