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Crosstalk-constrained multimode capacity of spectro-temporally multiplexed quantum memories. 光谱-时间复用量子存储器的串扰约束多模容量。
IF 3.3 2区 物理与天体物理
Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-21 DOI: 10.1364/OL.614273
Shi-Hai Wei, Liu Yuan, Ruiming Zhang, Xing-Yin Wei, Lixin Peng, Kun-Yue Shi, Xueying Zhang, Bo Jing, Guangwei Deng, Hai-Zhi Song
{"title":"Crosstalk-constrained multimode capacity of spectro-temporally multiplexed quantum memories.","authors":"Shi-Hai Wei, Liu Yuan, Ruiming Zhang, Xing-Yin Wei, Lixin Peng, Kun-Yue Shi, Xueying Zhang, Bo Jing, Guangwei Deng, Hai-Zhi Song","doi":"10.1364/OL.614273","DOIUrl":"https://doi.org/10.1364/OL.614273","url":null,"abstract":"<p><p>The time-bandwidth product (TBP) commonly characterizes the multimode capability of optical quantum memories. However, overlap between neighboring spectral and temporal modes causes crosstalk, reducing fidelity and the number of usable modes. Here, we develop a Gaussian crosstalk model for spectro-temporally multiplexed quantum memories and derive the maximum usable multimode capacity under a given fidelity requirement. For Fourier-transform-limited Gaussian photons, the multimode capacity can be expressed analytically in terms of the TBP, the required fidelity, and the timing jitter. For unit intrinsic fidelity and zero jitter, the multimode capacity is approximately 0.827, 0.628, and 0.399 times the TBP for fidelities of 0.90, 0.95, and 0.99, respectively. Timing jitter further reduces the achievable multimode capacity. These results provide a simple framework for estimating the usable multimode capacity of multiplexed quantum memories.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5770-5773"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sensing pulse-synchronous temporal entropy loading technique for co-wavelength optical fiber ISAC system. 共波长光纤ISAC系统传感脉冲同步时间熵加载技术。
IF 3.3 2区 物理与天体物理
Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-22 DOI: 10.1364/OL.614054
Meng Xiang, Bingbing Zhang, Weitao Zheng, Jiacai Liu, Songnian Fu, Yuwen Qin
{"title":"Sensing pulse-synchronous temporal entropy loading technique for co-wavelength optical fiber ISAC system.","authors":"Meng Xiang, Bingbing Zhang, Weitao Zheng, Jiacai Liu, Songnian Fu, Yuwen Qin","doi":"10.1364/OL.614054","DOIUrl":"https://doi.org/10.1364/OL.614054","url":null,"abstract":"<p><p>Co-wavelength optical fiber integrated sensing and communication (ISAC) improves spectral utilization but suffers from pulse-synchronous nonlinear impairments when high-peak-power sensing pulses overlap with communication symbols. Here, we propose a sensing pulse-synchronous temporal entropy loading (SP-TEL), which adapts probabilistically constellation-shaped (PCS) symbols to the sensing pulse-induced time-varying channel by assigning different entropies to corresponding pulse-overlapped and non-overlapped communication symbols, respectively. We experimentally validate the effectiveness of SP-TEL in a 40 GBaud four-subcarrier PCS-DP-64QAM co-wavelength ISAC system over 10.91 km standard single-mode fiber (SSMF). Compared with the traditional uniform-entropy technique, SP-TEL can improve the generalized mutual information (GMI) by 0.2 bit/symbol and reduce the required optical signal-to-noise ratio (OSNR) by up to 3 dB at the target GMI of 4.6 bit/symbol. Meanwhile, reliable 1 kHz vibration localization is secured with 10 m spatial resolution and a vibration SNR of 30.04 dB.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5794-5797"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
400 Gb/s coherent fiber-optic integrated sensing and communication with LFM optical carrier reuse. 基于LFM光载波复用的400gb /s相干光纤综合传感与通信。
IF 3.3 2区 物理与天体物理
Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-14 DOI: 10.1364/OL.609459
Zhengyu Pu, Haijun He, Hailong Fan, Xihua Zou, Wei Pan, Lianshan Yan
{"title":"400 Gb/s coherent fiber-optic integrated sensing and communication with LFM optical carrier reuse.","authors":"Zhengyu Pu, Haijun He, Hailong Fan, Xihua Zou, Wei Pan, Lianshan Yan","doi":"10.1364/OL.609459","DOIUrl":"https://doi.org/10.1364/OL.609459","url":null,"abstract":"<p><p>A coherent fiber-optic integrated sensing and communication (F-ISAC) system with linearly frequency-modulated (LFM) optical carrier reuse is experimentally demonstrated over standard single-mode fiber. In the proposed scheme, a communication signal carried by an LFM optical carrier is coupled with an unmodulated LFM optical carrier to form an integrated sensing and communication (ISAC) signal. The unmodulated LFM carrier is reused as both an in-band phase-noise reference for coherent communication and the distributed acoustic sensing (DAS) probe. By using this reference, the local-oscillator (LO) phase noise can be compensated, enabling cost-effective coherent receiving with a large-linewidth LO, while the same carrier generates the Rayleigh backscattering signal for DAS. Experiments demonstrate single-wavelength 400-Gb/s coherent transmission over 82 km using an approximately 5-MHz-linewidth LO, together with DAS operation with 5-m spatial resolution and 208-pε/sqrt(Hz) strain sensitivity. Compared with DAS using a pure LFM probe, only a 1.4-dB sensing penalty is introduced. Moreover, the carrier-to-signal power ratio-dependent communication-sensing trade-off is characterized, providing a flexible power-allocation guideline for coherent F-ISAC links.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5653-5656"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Adaptive liquid crystal iris enabled by self-assembled polymer gravels: publisher's note. 自组装聚合物砾石的自适应液晶虹膜：出版商注。
IF 3.3 2区 物理与天体物理
Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-16 DOI: 10.1364/OL.618069
Che Ju Hsu, Sonam Sharma, Rajiv Manohar, Chi Yen Huang
{"title":"Adaptive liquid crystal iris enabled by self-assembled polymer gravels: publisher's note.","authors":"Che Ju Hsu, Sonam Sharma, Rajiv Manohar, Chi Yen Huang","doi":"10.1364/OL.618069","DOIUrl":"https://doi.org/10.1364/OL.618069","url":null,"abstract":"<p><p>This publisher's note contains a correction to Opt. Lett.50, 4850 (2025).</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5757"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ray-resampling geometric distortion correction for imaging systems. 成像系统射线重采样几何畸变校正。
IF 3.3 2区 物理与天体物理
Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-17 DOI: 10.1364/OL.614269
Ziwei Wang, Xiaoying Peng, Yupei Miao, Shaolei Xu, Xiaojie Zhang, Qijian Tang, Xiaoli Liu
{"title":"Ray-resampling geometric distortion correction for imaging systems.","authors":"Ziwei Wang, Xiaoying Peng, Yupei Miao, Shaolei Xu, Xiaojie Zhang, Qijian Tang, Xiaoli Liu","doi":"10.1364/OL.614269","DOIUrl":"https://doi.org/10.1364/OL.614269","url":null,"abstract":"<p><p>This Letter presents a ray-resampling method for direct geometric distortion correction based on densely calibrated pixel-to-ray mappings. Instead of relying on system-specific distortion models, calibrated rays are intersected with an object-space reference plane and resampled onto a regular grid, allowing the same correction workflow to accommodate substantially different imaging geometries. The method is further extended to light-field imaging through sub-aperture ray reconstruction and resampling. Experiments on wide-angle, fisheye, and non-central catadioptric systems achieve overall linearity errors of 0.0202, 0.0337, and 0.0557 px, respectively. In structured light-field 3D reconstruction, the standard deviation of plane-fitting error decreases from 1.8386 mm to 0.1709 mm, demonstrating accurate geometric correction and improved downstream 3D measurement.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5669-5672"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multistate structural colors enabled by dual chalcogenide phase-change materials Ge2Sb2Se4Te1/Sb2S3. 双硫族相变材料Ge2Sb2Se4Te1/Sb2S3实现多态结构色。
IF 3.3 2区 物理与天体物理
Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-15 DOI: 10.1364/OL.609578
Mingyun Li, Tianle Yang, Yuheng Jin, Zhijian Chen, Yi Lu, Weifan Lai, Nan Chen, Yikun Bu
{"title":"Multistate structural colors enabled by dual chalcogenide phase-change materials Ge<sub>2</sub>Sb<sub>2</sub>Se<sub>4</sub>Te<sub>1</sub>/Sb<sub>2</sub>S<sub>3</sub>.","authors":"Mingyun Li, Tianle Yang, Yuheng Jin, Zhijian Chen, Yi Lu, Weifan Lai, Nan Chen, Yikun Bu","doi":"10.1364/OL.609578","DOIUrl":"https://doi.org/10.1364/OL.609578","url":null,"abstract":"<p><p>Phase-change-material-based structural colors provide a promising route toward dynamically tunable optical devices. However, achieving high brightness, low angular sensitivity, and multistate color modulation simultaneously remains challenging. Here, we propose and experimentally demonstrate a six-layer asymmetric Fabry-Pérot cavity combining two chalcogenide phase-change materials, Sb<sub>2</sub>S<sub>3</sub> and Ge<sub>2</sub>Sb<sub>2</sub>Se<sub>4</sub>Te<sub>1</sub>, to achieve high-brightness red, orange, and yellow structural colors. The experimental results are in good agreement with theoretical simulations. All fabricated samples exhibit reflectance exceeding 80% in the visible light spectrum and maintain excellent color stability over incident angles from 0° to 60°. By exploiting the distinct crystallization temperatures of Sb<sub>2</sub>S<sub>3</sub> and Ge<sub>2</sub>Sb<sub>2</sub>Se<sub>4</sub>Te<sub>1</sub>, step-wise phase transitions shift the colors from the initial red, orange, and yellow to dark states and subsequently to low-saturation gray tones. Consequently, the three primary colors are expanded into a dynamic matrix of nine distinct colors, achieving multistate color manipulation based on a dual-phase-change mechanism.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5657-5660"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fast line-by-line metrology of X-ray gratings. x射线光栅快速逐行计量。
IF 3.3 2区 物理与天体物理
Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-21 DOI: 10.1364/OL.607834
Kenneth A Goldberg, Andrew Lindburg, Morgan E Ericksen, James Nasiatka, Antoine Islegen-Wojdyla, Walan Grizolli, Dmitriy L Voronov
{"title":"Fast line-by-line metrology of X-ray gratings.","authors":"Kenneth A Goldberg, Andrew Lindburg, Morgan E Ericksen, James Nasiatka, Antoine Islegen-Wojdyla, Walan Grizolli, Dmitriy L Voronov","doi":"10.1364/OL.607834","DOIUrl":"https://doi.org/10.1364/OL.607834","url":null,"abstract":"<p><p>We describe an optical metrology tool for the measurement of X-ray gratings, demonstrated for pattern densities up to 600 lines/mm. Reflection gratings illuminated at glancing angles of incidence are the central dispersive elements used in many short-wavelength monochromators, spanning the energy spectrum from the vacuum ultraviolet to tender X-ray. In modern designs, gratings can be hundreds of mm long, and for high performance, their line-placement accuracy requirements are below 50 nm, a small fraction of the grating spatial period. Gratings with uniform and variable line spacing are both important in X-ray optics. We describe line-by-line pattern measurement using a focused 405 nm laser beam and a distance-measuring interferometer, achieving measurement precision as low as 11 nm rms and speeds up to 0.07 mm/s. Periodic variations in speckle intensity reveal the motion of the grating pattern.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5778-5781"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Watt-level single-longitudinal-mode Hermite-Gaussian lasing in a unidirectional ring cavity. 单向环形腔中瓦级单纵模厄米高斯激光。
IF 3.3 2区 物理与天体物理
Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-30 DOI: 10.1364/OL.614999
Dechen Zhan, Quan Sheng, Mingcheng Tian, Jianing Li, Pengbo Jiang, Zhenxu Bai, Shijie Fu, Wei Shi, Jianquan Yao
{"title":"Watt-level single-longitudinal-mode Hermite-Gaussian lasing in a unidirectional ring cavity.","authors":"Dechen Zhan, Quan Sheng, Mingcheng Tian, Jianing Li, Pengbo Jiang, Zhenxu Bai, Shijie Fu, Wei Shi, Jianquan Yao","doi":"10.1364/OL.614999","DOIUrl":"https://doi.org/10.1364/OL.614999","url":null,"abstract":"<p><p>We demonstrate watt-level single-longitudinal-mode (SLM) high-order Hermite-Gaussian (HG) mode lasing from an off-axis-pumped Nd:YVO<sub>4</sub> laser with a unidirectional ring cavity. This configuration combines simple pump-position-controlled transverse-mode selection with a mature and efficient architecture for SLM operation, offering a practical route toward power-scalable SLM structured-light lasers. The intrinsic astigmatism of the ring cavity further constrains the eigenmodes, supporting high-purity HG lasing and independent tuning of the two mode indices through the pump position. At an incident pump power of 3.18 W, the maximum output power of the high-order modes reaches 1.14 W, with slope efficiencies above 30%. SLM Laguerre-Gaussian beams are also obtained through astigmatic mode conversion. The influence of output coupling on laser efficiency and mode purity is investigated, revealing their trade-off and providing a reference for further power scaling.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5774-5777"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wearable III-nitride optoelectronic chip for gesture recognition. 用于手势识别的可穿戴iii -氮化物光电芯片。
IF 3.3 2区 物理与天体物理
Optics letters Pub Date : 2026-10-15 Epub Date: 2026-10-06 DOI: 10.1364/OL.617916
Wenxuan Wu, Tianchen Fang, Kang Fu, Jiabin Yan, Ziqi Ye, Yiting Shao, Yuan Sun, Yueli Hou, Yan Liu, Yongjin Wang
{"title":"Wearable III-nitride optoelectronic chip for gesture recognition.","authors":"Wenxuan Wu, Tianchen Fang, Kang Fu, Jiabin Yan, Ziqi Ye, Yiting Shao, Yuan Sun, Yueli Hou, Yan Liu, Yongjin Wang","doi":"10.1364/OL.617916","DOIUrl":"https://doi.org/10.1364/OL.617916","url":null,"abstract":"<p><p>Wearable III-nitride optoelectronic chips with monolithically integrated optical transmitters and receivers have emerged as a low-cost and highly portable platform for light-based sensing systems. III-nitride-based multiple quantum well (MQW) diodes inherently exhibit overlapping emission and detection spectra due to multiple energy levels within the MQW active region, with a spectral overlap from 481.54 nm to 534.03 nm. Here, we develop III-nitride optoelectronic chips for a wearable gesture recognition system using light. Together with a flexible programmable circuit, identical MQW diodes on a single III-nitride chip separately function as optical transmitters and receivers, enabling a reflective sensing architecture in a wearable optical system. These chips are integrated into a wearable platform attached to the fingers to establish optical sensing links. External finger motions modulate the emitted light, which is reflected back to the monolithically integrated MQW receiver. The encoded light is converted into electronic signals and processed by a multilayer perceptron for dynamic gesture recognition.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5910-5913"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wavelength-polarization channel-matching strategy for multiplexed metasurface holography. 多路超表面全息的波长偏振信道匹配策略。
IF 3.3 2区 物理与天体物理
Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-21 DOI: 10.1364/OL.610267
Dengbiao Wang, Jiuxu Wang, Mingwen Yang, Wei Lu, Shaowei Wang
{"title":"Wavelength-polarization channel-matching strategy for multiplexed metasurface holography.","authors":"Dengbiao Wang, Jiuxu Wang, Mingwen Yang, Wei Lu, Shaowei Wang","doi":"10.1364/OL.610267","DOIUrl":"https://doi.org/10.1364/OL.610267","url":null,"abstract":"<p><p>Joint wavelength-polarization multiplexing can increase the information capacity of metasurface holography, but scalable channel selection is limited by the mismatch between prescribed polarization states and the attainable birefringent dispersion of a meta-atom library. Here, we propose a wavelength-polarization channel-matching strategy that aligns the required birefringent phase difference with the intrinsic dispersion of the library. By reshaping polarization-evolution paths before hologram optimization, physically compatible wavelength-polarization channels are identified on an all-silicon mid-infrared metasurface. Scalar-diffraction calculations based on the FDTD-derived meta-atom library demonstrate multiplexed holographic reconstruction over seven joint wavelength-polarization channels spanning 2700-4675 nm. This strategy provides a route for high-dimensional metasurface holography and multichannel optical information encoding.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5782-5785"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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