IEEE Photonics Technology Letters最新文献

{"title":"Optoelectronic Oscillator Combining a High-Finesse Cavity and Tilt-Locking Stabilization","authors":"Brian Sinquin;Marc Vallet;Marco Romanelli;Mehdi Alouini","doi":"10.1109/LPT.2025.3544428","DOIUrl":"https://doi.org/10.1109/LPT.2025.3544428","url":null,"abstract":"We report the implementation of a single-pass tilt-locking stabilization scheme in an opto-electronic oscillator using a high-finesse Fabry-Perot as photonic filter. A table-top setup leads to a phase noise level of −80 dBc/Hz at 1 kHz offset from a 6 GHz carrier and a Allan deviation measurement of <inline-formula> <tex-math>$3times textbf {10}^{-10}$ </tex-math></inline-formula> for 1 s integration time. Future improvements leading to a compact fiber-free OEO are discussed.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 6","pages":"321-324"},"PeriodicalIF":2.3,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521479","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}

{"title":"Folded Sub-1V Vπ Thin Film Lithium Niobate Phase Modulator","authors":"Xiaofeng Zhu;Marco Moller de Freitas;Shouyuan Shi;Peng Yao;Fuquan Wang;Christopher J. Cullen;Maxwell Hinkle;Dennis W. Prather","doi":"10.1109/LPT.2025.3544127","DOIUrl":"https://doi.org/10.1109/LPT.2025.3544127","url":null,"abstract":"This work reports a sub-1 volt drive voltage (V<inline-formula> <tex-math>$_{pi } $ </tex-math></inline-formula>) folded phase modulator utilizing capacitor-loaded traveling wave electrodes (CLTWEs). The implementation employs a low-loss CLTWE on a quartz (Qz) substrate, facilitating both broadband index matching and minimal RF loss. A series of phase modulators of varying lengths have been fabricated and subjected to experimental characterization. The measured loss for straight CLTWEs is 0.21 dB/(cm<inline-formula> <tex-math>$cdot $ </tex-math></inline-formula>GHz<inline-formula> <tex-math>$^{1/2}$ </tex-math></inline-formula>). The experimentally determined DC V<inline-formula> <tex-math>$pi $ </tex-math></inline-formula> is 0.52 V for a modulation length of 7.5 cm.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 5","pages":"301-304"},"PeriodicalIF":2.3,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10896707","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496469","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}

{"title":"Microring-Based Dual-Drop Weight Bank With Improved Linearity","authors":"Ziyi Fu;Zichao Zhao;Qishen Liang;Bei Chen;Shilan Zhou;Yawen Tu;Yuehai Wang;Jianyi Yang","doi":"10.1109/LPT.2025.3542876","DOIUrl":"https://doi.org/10.1109/LPT.2025.3542876","url":null,"abstract":"In this work, we demonstrated a microring-based dual-drop weight bank (DD-WB) for photonics neural networks. By tuning the resonant wavelengths of a microring pair, a large and tunable linear region can be realized for weight matrix mapping. In addition, a specialized configuration method is presented to efficiently employ weight values upon the DD-WB. To verify the performance of our scheme, we designed and fabricated a silicon photonics chip with 1-channel and 2-channel DD-WB on-chip structures. Experiments show improved linearity and good robustness of the fabricated chip by performing the weight encoding. Furthermore, an on-chip photonic neural network for Iris classification task is implemented, which achieved an accuracy of 93.33% with the testing set.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 5","pages":"281-284"},"PeriodicalIF":2.3,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480813","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}

{"title":"Exploring GaAs/InGaAs/GaAs 2DEG Inter-Subband Scattering Coefficients of Light-Emitting Transistors","authors":"Lucas Yang;Ying-Tzu Chen;Shu-Wei Chang;Chao-Hsin Wu","doi":"10.1109/LPT.2025.3542503","DOIUrl":"https://doi.org/10.1109/LPT.2025.3542503","url":null,"abstract":"This letter explores the inter-subband scattering properties in n-p-n quantum well heterojunction bipolar light-emitting transistors (QW-HBLETs or LETs). We showed a steady-state method to extract the inter-subband transition coefficients and get around the difficulty of RF characterization by fitting the concentration ratios of unbounded and bounded electrons in the QW to get the inter-subband scattering coefficients. Our investigation revealed that the inter-subband scattering coefficients decreased with increasing temperature and Fermi level in the two-dimensional electron gas. Additionally, we compared the capture lifetimes and the escape lifetimes of LETs to confirm the necessity of the Fermi level-dependent scattering coefficients.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 6","pages":"337-340"},"PeriodicalIF":2.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553348","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}

{"title":"Dual Encryption of Terahertz Metasurface by Frequency-Temperature Co-Determination","authors":"Qi Chen;Quanjie Xiong;Jinqi Dong;Shuyun Lin;Liang Liu","doi":"10.1109/LPT.2025.3541198","DOIUrl":"https://doi.org/10.1109/LPT.2025.3541198","url":null,"abstract":"In recent years, terahertz metasurfaces have become powerful tools for manipulating terahertz waves. The rapid advancement of intelligence and information technology creates a growing demand for tunable and reconfigurable devices in engineering applications to adapt to various scenarios and conditions. Dynamic metasurfaces, with their tunable properties, enable the creation of reconfigurable and programmable electromagnetic devices, thus advancing the development of sophisticated multifunctional systems. Apart from techniques including optical pumping of semiconductor materials and microelectromechanical systems, phase-change materials have also emerged as a promising approach for the dynamic modulation of terahertz metasurfaces. In this letter, vanadium dioxide with two different phase transition temperatures was integrated into a single unit. By utilizing the effect of electromagnetically induced transparency and prearranging metasurface units according to a specific hologram, an image requiring encryption was encoded into the metasurface, achieving optical encryption through temperature variation. When the temperature is below <inline-formula> <tex-math>$60~^{circ }$ </tex-math></inline-formula> C, the transmitted light field appears as random spots, devoid of any useful information. However, when the temperature rises to between <inline-formula> <tex-math>$60~^{circ }$ </tex-math></inline-formula> C and <inline-formula> <tex-math>$72~^{circ }$ </tex-math></inline-formula> C and terahertz waves at a frequency of 0.631 THz are incident, the encrypted letter “C” can be reconstructed. When the temperature exceeds <inline-formula> <tex-math>$72~^{circ }$ </tex-math></inline-formula> C and terahertz waves at a frequency of 0.43 THz are incident, the encrypted letter “E” can be reconstructed. If the conditions of temperature and frequency are not simultaneously satisfied, no useful information can be obtained. The proposed method provides a novel approach for the design of reconfigurable terahertz metasurfaces, with substantial potential for applications in optical encryption and anti-counterfeiting technologies.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 5","pages":"305-308"},"PeriodicalIF":2.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496459","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}

{"title":"High Power Burst-Mode Laser Seeded by an Electro-Optic Q-Switched Hundreds Picosecond Oscillator","authors":"Ao-Nan Zhang;Zhen-Ling Li;Ke Liu;Xiao-Jun Wang","doi":"10.1109/LPT.2025.3541917","DOIUrl":"https://doi.org/10.1109/LPT.2025.3541917","url":null,"abstract":"We have proposed and experimentally demonstrated a simple, compact hundreds picosecond (ps) burst-mode laser with good beam quality, seeded by a Q-switched microchip laser. The hundreds ps seed pulse was injected into a laser diode (LD) end-pumped electro-optic (EO) Q-switched Nd:YVO4 laser via a partial transmittance plan mirror. During a 20 kHz burst-mode operation, a hundreds ps burst-mode laser with a 19 ns envelope was obtained, delivering a burst energy of up to 0.49 mJ with a sub-pulse width of 741 ps and a sub-pulse interval of <inline-formula> <tex-math>$sim ; 3.2$ </tex-math></inline-formula> ns. A good beam quality factor was measured to be <inline-formula> <tex-math>$M^{2}=1.19$ </tex-math></inline-formula>.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 5","pages":"293-296"},"PeriodicalIF":2.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496591","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}

{"title":"Generation of Millijoule Few-Cycle Pulses by a Compact Single-Stage Gas-Filled Multi-Pass Cell","authors":"Zhongchao Li;Qi Liu;Yang Liu;Guorong Wu;Guoqing Chang;Wei Liu","doi":"10.1109/LPT.2025.3541233","DOIUrl":"https://doi.org/10.1109/LPT.2025.3541233","url":null,"abstract":"We report on nonlinear spectral broadening and post-compression of 1-mJ, 146-fs pulses in a compact single-stage gas-filled multi-pass cell (MPC). With an overall transmission of ~96%, the compressed pulses have a duration of 17.3 fs (corresponding to a compression factor of ~8.4) with 0.96-mJ energy and excellent beam quality (M<inline-formula> <tex-math>$^{2} = 1.35times 1.12$ </tex-math></inline-formula>). To the best of our knowledge, this work marks the first successful generation of millijoule-level few-cycle pulses at a 1-<inline-formula> <tex-math>$mu $ </tex-math></inline-formula>m wavelength using a single-stage gas-filled MPC.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 5","pages":"313-316"},"PeriodicalIF":2.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521433","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}

{"title":"Cladding Modes Generation Through Highly Localized Bragg Grating in Polymer Optical Fiber","authors":"Hang Qu;Jiaxin Li;Rui Min;Getinet Woyessa;Ole Bang;Peng-Cheng Li;Xuehao Hu","doi":"10.1109/LPT.2025.3541835","DOIUrl":"https://doi.org/10.1109/LPT.2025.3541835","url":null,"abstract":"Thanks to the highly localized fiber Bragg grating obtained by a femtosecond laser and point-by-point inscription method, a cladding mode spectral range of over 80 nm is achieved in polymer optical fibers. After grating inscription, refractometric measurement is conducted within a range from 1.38 to 1.54 to measure the surrounding refractive index, and the evolution of the cladding mode resonances is analyzed accordingly. By monitoring the cutoff mode, the refractive index sensitivity is found to be 527 nm/RIU (refractive index unit). The originality of our work lies in the production of highly localized FBGs with a large spectral range of cladding mode resonances in polymer optical fibers, capable of measuring refractive indices in a wide range in aqueous solutions and (bio)chemical media.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 6","pages":"341-344"},"PeriodicalIF":2.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553424","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}

{"title":"Improved Crystallization and Optical Performance of Mixed Ruddlesden-Popper Perovskite","authors":"Jiaying Suo;Wanxiao Gao;Xinyao Bai;Ruonan Du;Zhenxu Bai;Yaoyao Qi;Bingzheng Yan;Xin Li;Jie Ding","doi":"10.1109/LPT.2025.3541314","DOIUrl":"https://doi.org/10.1109/LPT.2025.3541314","url":null,"abstract":"Ruddlesden-Popper perovskites have recently been a hot topic due to their high stability and excellent optoelectronic performances. Different cation substitution endows the structures with other properties. Here, an in-depth theoretical model has been proposed to analyze the effect of cation amount on electronic structure. Accordingly, a series of quasi-two-dimensional lead halide perovskite single crystals have been prepared by combining vapor and solution methods at room temperature. The effect of cations on optoelectronic devices was studied by analyzing the photocurrent of the photodetectors. The results show that the addition of cationic methylamine can result in devices with superior performance. These results enhance our understanding of the regulation of cations in materials and contribute to the fabrication of optoelectronic devices with better performance.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 5","pages":"297-300"},"PeriodicalIF":2.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496458","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}

{"title":"Heterodyne-Based Interrogation of FBGs Temporally and Spectrally Multiplexed in Bus Topology","authors":"Takahiro Matsumoto;Keiji Kuroda","doi":"10.1109/LPT.2025.3540904","DOIUrl":"https://doi.org/10.1109/LPT.2025.3540904","url":null,"abstract":"This letter reports on the interrogation of fiber Bragg gratings (FBGs) arranged in a bus topology. By applying time- and wavelength-division multiplexing techniques, FBGs incorporated within a branch are distinguished spectrally and FBGs incorporated within different branches are distinguished temporally, respectively. This hybrid multiplexing method allows the number of FBG sensor heads to be increased. A heterodyne detection technique is used to increase the signal-to-noise ratio of the weak reflection signals. Reflections from six FBGs with two peak wavelengths are observed simultaneously as beat oscillations.","PeriodicalId":13065,"journal":{"name":"IEEE Photonics Technology Letters","volume":"37 5","pages":"273-276"},"PeriodicalIF":2.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496522","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}