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IEEE Photonics Technology Letters最新文献

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Pump Frequency Allocation and Dispersion Effect on Dual-Pump Phase Sensitive Amplifier Gain Spectrum 双泵相敏放大器增益谱的泵频分配及色散效应
IF 2.5 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-30 DOI: 10.1109/LPT.2025.3594193
Ruwan U. Weerasuriya;Junda Chen;Rasmus Larsson;Peter A. Andrekson
{"title":"Pump Frequency Allocation and Dispersion Effect on Dual-Pump Phase Sensitive Amplifier Gain Spectrum","authors":"Ruwan U. Weerasuriya;Junda Chen;Rasmus Larsson;Peter A. Andrekson","doi":"10.1109/LPT.2025.3594193","DOIUrl":"https://doi.org/10.1109/LPT.2025.3594193","url":null,"abstract":"Dual-pump fiber optical parametric amplifiers offer wide, flat gain spectra across arbitrary wavelengths, often outperforming the use of single-pump designs. However, gain flatness depends on the pump frequencies’ center of gravity relative to the nonlinear fiber’s zero-dispersion wavelength. This study experimentally investigated the gain, gain flatness, and noise figure of degenerate dual-pump fiber-optic phase-sensitive amplification at various separations between these points. We demonstrated 38 dB gain with 1.5 dB gain flatness variation over a 30 nm bandwidth as well as a noise figure below the conventional 3 dB quantum limit for a degenerate signal.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 22","pages":"1273-1276"},"PeriodicalIF":2.5,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11104133","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868354","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}
引用次数: 0
Multi-Band Operated and Low Power Consumption TO VOA on Silica Platform 二氧化硅平台上的多频段低功耗TO VOA
IF 2.5 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-25 DOI: 10.1109/LPT.2025.3592710
Guoyan Zeng;Daming Zhang;Minghui Zhou;Shiyoshi Yokoyama;Yuexin Yin
{"title":"Multi-Band Operated and Low Power Consumption TO VOA on Silica Platform","authors":"Guoyan Zeng;Daming Zhang;Minghui Zhou;Shiyoshi Yokoyama;Yuexin Yin","doi":"10.1109/LPT.2025.3592710","DOIUrl":"https://doi.org/10.1109/LPT.2025.3592710","url":null,"abstract":"Silica based planar lightwave circuit (PLC) technology is wide commercialized for passive device but suffers from high power consumption. In this letter, a multi-band operated thermo-optic (TO) variable optical attenuator (VOA) with a low power consumption is demonstrated experimentally on silica-based PLC platform. To achieve multi-band and low loss property, Bezier multimode interferometer is utilized for the Mach–Zehnder interferometer based VOA. With folded modulation arms introducing, the power consumption for <inline-formula> <tex-math>$pi $ </tex-math></inline-formula> shift is reduced to 134/156 mW at 1310/1550 nm. The insertion losses/excess losses in O band and C+L band are lower than 4.4/0.9 dB and 4.7/0.7 dB, respectively. The attenuations are larger than 10.1 dB in O band and 16.0 dB in C+L band. The maximum attenuations are 14.8/28.2 dB at 1320.21/1594.40 nm. At 1310/1550 nm, the rise (10%–90%) and fall time (90%–10%) of the optical signal in VOA are 0.94/0.56 ms and 1.13/1.32 ms, respectively. The proposed structure is potential for optical switch, tunable filter, and other TO devices with broadband and power efficient property.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 21","pages":"1237-1240"},"PeriodicalIF":2.5,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144751042","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}
引用次数: 0
Millijoule-Level Ultra-Large Core Ytterbium-Doped Pulsed Fiber Amplifier Operating at 980 nm 毫焦耳级超大芯掺镱脉冲光纤放大器工作在980纳米
IF 2.5 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-25 DOI: 10.1109/LPT.2025.3592838
Pablo G. Rojas Hernandez;Shankar Pidishety;Mohammad Belal;Johan Nilsson
{"title":"Millijoule-Level Ultra-Large Core Ytterbium-Doped Pulsed Fiber Amplifier Operating at 980 nm","authors":"Pablo G. Rojas Hernandez;Shankar Pidishety;Mohammad Belal;Johan Nilsson","doi":"10.1109/LPT.2025.3592838","DOIUrl":"https://doi.org/10.1109/LPT.2025.3592838","url":null,"abstract":"We report a record-high 5.5-mJ amplified pulse energy at 980 nm, achieving 0.55 kW peak power using a 1-meter long ultra-large-mode-area (<inline-formula> <tex-math>$290~mu $ </tex-math></inline-formula>m core) ytterbium fiber in a co-directional, amplifier configuration. Pumped at 915 nm and seeded by a modulated 980-nm laser diode. We provide a detailed fiber spectroscopy analysis, optimizing key parameters—such as seed and pump repetition rates to mitigate thermal load and other detrimental effects (e.g., re-absorption), enabling high-energy output. The amplifier’s performance highlights its applications for high-brightness ultraviolet and visible light generation, and as an efficient pump for erbium-doped fiber systems, advancing their performances in fluorescence imaging, marine engineering and biophotonics. To the best of our knowledge, the achieved output energy of 5.5 mJ is the highest reported to date in an ytterbium-doped-fiber amplifier at 980-nm, while offering simpler fabrication, configuration and enhanced compatibility compared to other fiber systems at similar wavelengths.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 22","pages":"1277-1280"},"PeriodicalIF":2.5,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868356","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}
引用次数: 0
Fringe-Aided Specular Projection Moiré Method for Multi-Area 3D Morphology Measurement 条纹辅助镜面投影莫尔法用于多区域三维形貌测量
IF 2.5 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-24 DOI: 10.1109/LPT.2025.3592340
Chengyi Shou;Chen Sun;Jubing Chen
{"title":"Fringe-Aided Specular Projection Moiré Method for Multi-Area 3D Morphology Measurement","authors":"Chengyi Shou;Chen Sun;Jubing Chen","doi":"10.1109/LPT.2025.3592340","DOIUrl":"https://doi.org/10.1109/LPT.2025.3592340","url":null,"abstract":"The specular surfaces often exist as multi-areas in industries and require high-precision morphology measurement. This letter proposes a fringe-aided specular projection moiré method for multi-area specular morphology measurement. A strategy for moiré component selection is developed to generate the optimized moiré pattern for different types of mirrors. Additionally, an identification method based on windowed Fourier transform is introduced to detect specular regions. Thus, the principle of the fringe-aided specular projection moiré method is proposed. An experiment is carried out to validate the method’s performance, where a mirror array consisting of two concave and one convex is measured. The results show that the proposed method is able to recognize specular areas and extract the wanted moiré patterns for different mirrors, and the method achieves micron-level precision in morphology measurements.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 21","pages":"1241-1244"},"PeriodicalIF":2.5,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144750947","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}
引用次数: 0
Beam Profile Characterization of a 4-Parabolic-Mirror THz Time-Domain Transmission Imaging System 4-抛物面镜太赫兹时域传输成像系统的光束轮廓特性
IF 2.5 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-24 DOI: 10.1109/LPT.2025.3592266
Yeganeh Farahi;Andrei Gorodetsky;Miguel Navarro-Cía
{"title":"Beam Profile Characterization of a 4-Parabolic-Mirror THz Time-Domain Transmission Imaging System","authors":"Yeganeh Farahi;Andrei Gorodetsky;Miguel Navarro-Cía","doi":"10.1109/LPT.2025.3592266","DOIUrl":"https://doi.org/10.1109/LPT.2025.3592266","url":null,"abstract":"Knowing the beam properties in THz spectroscopy and imaging systems is paramount for accurate extraction of material properties and good image qualities. Utilizing knife-edge and pinhole scanning, we beam profile a commercial U-shape 4-parabolic-mirror transmission imaging system based on integrated Si lens photoconductive switches. The beam is minimally asymmetric at the focal plane with corrected beam waist along the direction parallel to the E-field and H-field ranging from 2.4 mm to 1.1 mm and from 2.3 mm to 1.0 mm, respectively, in the frequency range 0.5 to 1.2 THz. The experimental cross-polar value is consistently -10 dB approximately. The confocal distance, also known as Rayleigh range, that imposes a limitation in the maximum thickness sample for accurate spectroscopy imaging, is experimentally estimated in the range 0.5 to 1.2 THz to be from 11.3 mm to 6.9 mm along the E-plane, and from 13 mm to 4.6 mm along the H-plane.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 20","pages":"1213-1216"},"PeriodicalIF":2.5,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144725311","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}
引用次数: 0
Photonic Arbitrary Waveform Generation Based on Delta-Sigma Modulation and Spectrum Stitching 基于Delta-Sigma调制和频谱拼接的光子任意波形生成
IF 2.5 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-24 DOI: 10.1109/LPT.2025.3592222
Ao Zeng;Bo Yang;Shuna Yang;Yiran Gao;Hao Chi
{"title":"Photonic Arbitrary Waveform Generation Based on Delta-Sigma Modulation and Spectrum Stitching","authors":"Ao Zeng;Bo Yang;Shuna Yang;Yiran Gao;Hao Chi","doi":"10.1109/LPT.2025.3592222","DOIUrl":"https://doi.org/10.1109/LPT.2025.3592222","url":null,"abstract":"This Letter introduces a novel approach to photonic arbitrary waveform generation (PAWG) that employs delta-sigma modulation (DSM) and spectrum stitching techniques. The approach divides a wideband target signal into multiple spectral sub-signals. Each sub-signal is processed through DSM to produce two 1-bit pulse sequences, which are modulated onto an optical pulse train using a dual-drive Mach-Zehnder modulator (DD-MZM). The DD-MZM operates differentially to double the pulse repetition rate, enhancing the bandwidth of the output waveform. After photodetection, bandpass filtering, and spectrum stitching, a wideband signal can be synthesized. A proof-of-concept experiment successfully demonstrates the generation of chirp signals with different formats, validating the effectiveness and potential of the proposed PAWG method in wideband signal generation.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 21","pages":"1221-1224"},"PeriodicalIF":2.5,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144751047","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}
引用次数: 0
Metasurface-Based Wide Amplitude Modulated Airy Beams for Particle Manipulation 基于超表面的宽振幅调制艾里光束用于粒子操纵
IF 2.5 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-24 DOI: 10.1109/LPT.2025.3592295
Yaokun Shi;Zhiyuan Xiang;Zhe Shen
{"title":"Metasurface-Based Wide Amplitude Modulated Airy Beams for Particle Manipulation","authors":"Yaokun Shi;Zhiyuan Xiang;Zhe Shen","doi":"10.1109/LPT.2025.3592295","DOIUrl":"https://doi.org/10.1109/LPT.2025.3592295","url":null,"abstract":"Airy beams with specific amplitude and phase distributions are intriguing due to their self-reconstruction, nondiffraction, and self-accelerating properties. Previously most metasurfaces took only modulating phase for the generation of Airy beams, resulting in a certain distance for beam forming, which hampers their applications in optical manipulation. In this work, we reported a method to generate 2D/array Airy beams by using phase-amplitude-modulated metasurfaces and investigated their particle manipulation. The designed metasurfaces have an ultra-wide amplitude modulation range with a transmittance from 9% to 92% in order that the generated 2D Airy beams can be formed immediately after a short propagation distance. The self-healing property of the generated 2D Airy beams was demonstrated. Quantitative analysis of the optical forces shows that the generated 2D Airy beams can stably trap and drive particles even being obstructed. In addition, we introduced a strategy to build array Airy beams by superposing four rotated 2D ones and demonstrated their self-healing property. Our work advances the application of Airy beams in optical tweezers and highlights their potential in optical, biological, and atmospheric science.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 21","pages":"1225-1228"},"PeriodicalIF":2.5,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144751046","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}
引用次数: 0
Large Aperture Liquid Prism With Extended Deflection Range 大口径液体棱镜，扩展偏转范围
IF 2.5 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-24 DOI: 10.1109/LPT.2025.3592280
Xintong Wang;Bingkun Xie;Guohan Gao;Lei Li
{"title":"Large Aperture Liquid Prism With Extended Deflection Range","authors":"Xintong Wang;Bingkun Xie;Guohan Gao;Lei Li","doi":"10.1109/LPT.2025.3592280","DOIUrl":"https://doi.org/10.1109/LPT.2025.3592280","url":null,"abstract":"Traditional liquid prisms face challenges in achieving large aperture and wide deflection angle. In this letter, a large aperture liquid prism with mechanical drive is proposed. Four baffle plates are used in the prism cavity to achieve rigid constraints on the movement of the deflector at the L-L interface. The proposed device achieves the deflection of one-dimensional FOV with a large aperture of 16 mm and a deflection angle of 7.4°(±3.7°). The proposed device can also realize two- dimensional scanning by stacking two identical prisms together. This work addresses key limitations of existing liquid prisms, providing new solutions for applications in optical scanning, imaging, and adaptive systems.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 21","pages":"1229-1232"},"PeriodicalIF":2.5,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144751045","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}
引用次数: 0
DBR Lasers at 679.29 and 707.20 nm for Efficient Repumping in Sr Optical Lattice Clocks 679.29 nm和707.20 nm DBR激光器在Sr光学晶格钟中的高效重泵浦
IF 2.5 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-22 DOI: 10.1109/LPT.2025.3591153
Nora Goossen-Schmidt;Bassem Arar;Jörg Fricke;Karl Häusler;Andre Maaßdorf;Max Schiemangk;Sandy Szermer;Hans Wenzel;Andreas Wicht
{"title":"DBR Lasers at 679.29 and 707.20 nm for Efficient Repumping in Sr Optical Lattice Clocks","authors":"Nora Goossen-Schmidt;Bassem Arar;Jörg Fricke;Karl Häusler;Andre Maaßdorf;Max Schiemangk;Sandy Szermer;Hans Wenzel;Andreas Wicht","doi":"10.1109/LPT.2025.3591153","DOIUrl":"https://doi.org/10.1109/LPT.2025.3591153","url":null,"abstract":"We have developed and characterized DBR lasers emitting at 679 nm and 707 nm, specifically tailored to excite the repumping wavelengths in Sr optical lattice clocks. They achieve a FWHM linewidth of about 1MHz at optical output powers of more than 65 mW.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 20","pages":"1205-1208"},"PeriodicalIF":2.5,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11088233","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144725248","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}
引用次数: 0
High-Fidelity Digital Coherent Fronthaul Employing Bit Interleaving and Geometric Shaping 采用位交错和几何整形的高保真数字相干前传
IF 2.3 3区 工程技术
IEEE Photonics Technology Letters Pub Date : 2025-07-22 DOI: 10.1109/LPT.2025.3590957
Xi Chen;Yixiao Zhu;Yicheng Xu;Yongxin Sun;Leyan Fei;Weisheng Hu;Qunbi Zhuge
{"title":"High-Fidelity Digital Coherent Fronthaul Employing Bit Interleaving and Geometric Shaping","authors":"Xi Chen;Yixiao Zhu;Yicheng Xu;Yongxin Sun;Leyan Fei;Weisheng Hu;Qunbi Zhuge","doi":"10.1109/LPT.2025.3590957","DOIUrl":"https://doi.org/10.1109/LPT.2025.3590957","url":null,"abstract":"Coherent detection has gradually gained acceptance for digital radio-over-fiber (D-RoF). In D-RoF transmission, quantized wireless waveform bits require unequal bit protection (UBP) due to their varying importance, unlike conventional digital communication where all bits in 0/1 streams hold equal significance. In this letter, we propose and experimentally demonstrate an interleaved uneven modulation-based UBP (IUM-UBP) scheme for high-fidelity coherent digital fronthaul. Bit interleaving and geometric shaping are employed to ensure the superior performance of more important bits. In the experiment, the proposed scheme achieves significant improvements in recovered signal-to-noise ratio (SNR) of wireless waveform, reaching 35.5 dB, 20.5 dB, and 10.2 dB gain when using quantization bits of 16, 12, and 8, respectively. The results demonstrate that the proposed IUM-UBP scheme provides a viable solution for flexible and high-fidelity coherent digital fronthaul.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 20","pages":"1197-1200"},"PeriodicalIF":2.3,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716282","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}
引用次数: 0
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