Optics letters最新文献_第8页

Demonstration of optical pattern matching between two QPSK data channels using nonlinear wave mixing. 两个QPSK数据通道间的非线性混频光学模式匹配演示。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.572354

Abdulrahman Alhaddad, Wing Ko, Amir Minoofar, Muralekrishnan Ramakrishnan, Huibin Zhou, Hongkun Lian, Zile Jiang, Xinzhou Su, Narek Karapetyan, Yingning Wang, Ruoyu Zeng, Ahmed Almaiman, Moshe Tur, Jonathan L Habif, Alan E Willner

{"title":"Demonstration of optical pattern matching between two QPSK data channels using nonlinear wave mixing.","authors":"Abdulrahman Alhaddad, Wing Ko, Amir Minoofar, Muralekrishnan Ramakrishnan, Huibin Zhou, Hongkun Lian, Zile Jiang, Xinzhou Su, Narek Karapetyan, Yingning Wang, Ruoyu Zeng, Ahmed Almaiman, Moshe Tur, Jonathan L Habif, Alan E Willner","doi":"10.1364/OL.572354","DOIUrl":"https://doi.org/10.1364/OL.572354","url":null,"abstract":"Optical signal processing can provide high-speed operation on optical data and avoidance of optical-to-electrical-to-optical conversion. In many networking scenarios, the optical data may be encoded as quadrature-phase-shift-keying (QPSK) for spectral efficiency and noise tolerance. One signal processing function is pattern matching between two data streams, which directly compares their data patterns and can be useful for network security and improving data transmission. In this work, we experimentally demonstrate optical pattern matching between two independent QPSK data inputs using nonlinear wave mixing. The QPSK channels and their delayed copies are combined at the input of a highly nonlinear fiber (HNLF) along with a continuous wave pump. The data channels and pump undergo four-wave mixing in the HNLF to generate a 9-ary quadrature amplitude modulation (9-QAM) output. The output symbols correspond to the matched, partially matched, and mismatched 2-symbol patterns between the two QPSK inputs. The 9-QAM output constellation has an error-vector-magnitude of 8.4% and 8.9% at 3-Gbaud and 5-Gbaud rates, respectively, resulting in error-free optical pattern matching between the two QPSK inputs over 1536 symbols.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 19","pages":"6125-6128"},"PeriodicalIF":3.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145207234","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

Multi-operator-based model-driven self-supervised learning for fluorescence diffusion tomography. 基于多算子模型驱动的荧光扩散断层扫描自监督学习。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.572740

Yuxuan Jiang, Yulin Cao, Yuxiang Dou, Yujun Wu, Haofeng Xia, Wei Jiang, Fei Huang, Qiubai Li, Yong Deng

引用次数: 0

Laser-cooled ¹⁷¹Yb⁺ microwave clock with a systematic uncertainty of 7.8×10^-15. 系统不确定度为7.8×10-15的激光冷却171Yb+微波时钟。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.570488

Y T Chen, Y Zheng, S N Miao, W X Shi, S T Chen, J W Zhang, L J Wang

引用次数: 0

205 W TEM₀₀-mode-stacked Nd:YAG rotary disk laser with air cooling. 205w tem00模式堆叠Nd:YAG旋转盘激光器与空气冷却。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.573623

Chen Sanbin, Kenichi Ueda, Xiaojun Tang, Jianlang Li

引用次数: 0

Uniform low-loss cyclic arrayed waveguide grating router with input splitters and output combiners. 具有输入分频器和输出合成器的均匀低损耗循环阵列波导光栅路由器。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.573611

Shuojian Zhang, Jiamei Gu, Huimin Yan, Zikang Xu, Zhuping Fan, Jian-Jun He

引用次数: 0

Raman-assisted high-efficiency soliton microcombs in a SiO₂ microsphere. SiO2微球中拉曼辅助的高效孤子微梳。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.571618

Jin Li, Rui Niu, Shuai Wan, Ming Li, Fang-Wen Sun, Guang-Can Guo, Chun-Hua Dong

{"title":"Raman-assisted high-efficiency soliton microcombs in a SiO2 microsphere.","authors":"Jin Li, Rui Niu, Shuai Wan, Ming Li, Fang-Wen Sun, Guang-Can Guo, Chun-Hua Dong","doi":"10.1364/OL.571618","DOIUrl":"https://doi.org/10.1364/OL.571618","url":null,"abstract":"Soliton microcombs, generated in high-Q microresonators, have revolutionized integrated photonic technologies such as optical clocks, spectroscopy, and telecommunications. However, conventional pump schemes suffer from low pump-to-soliton conversion efficiency and high power threshold. Besides, parasitic nonlinear processes such as stimulated Raman scattering (SRS) may also affect the generation and stabilization of soliton states. Here, we realize a high-efficiency soliton microcomb with a low power threshold by exploiting the synergistic interplay between SRS and four-wave mixing (FWM) in a high-Q SiO2 microsphere. A dual-pump strategy-where a primary pump triggers the Raman gain and a secondary pump initiates soliton microcomb formation-enables 21.8% conversion efficiency from the pump laser to the soliton state. Experimental evidence reveals that the introduction of the secondary pump allows the tuning of the center frequency of the Raman soliton microcomb within the Raman gain region. This approach not only reduces the soliton formation threshold but also enables robust soliton stabilization via dynamic Raman gain compensation and thermal suppression. Our work provides a universal pathway for energy-efficient nonlinear photonics in Raman-active microresonators.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 19","pages":"5945-5948"},"PeriodicalIF":3.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145207154","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

Refraction error compensation method based on a pixel-deviation look-up table for fringe projection profilometry in the cross-media three-dimensional shape measurement. 基于像素偏差查找表的条纹投影轮廓法跨介质三维形状测量折射误差补偿方法。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.572424

Chao Chen, Xukang Cai, Bingxue Yi, Qing Chang

{"title":"Refraction error compensation method based on a pixel-deviation look-up table for fringe projection profilometry in the cross-media three-dimensional shape measurement.","authors":"Chao Chen, Xukang Cai, Bingxue Yi, Qing Chang","doi":"10.1364/OL.572424","DOIUrl":"https://doi.org/10.1364/OL.572424","url":null,"abstract":"Refraction-induced image distortion produces large errors in cross-media three-dimensional (3D) shape measurement using fringe projection profilometry (FPP). In this Letter, a refraction error compensation method based on a pixel-deviation look-up table (PD-LUT) is proposed. First, pixel deviation with and without light refraction is constructed as PD-LUT. Then, with the PD-LUT and a tri-linear interpolation algorithm, error compensation values in measurement are determined for correcting the erroneous pixel coordinates of measured points. Finally, 3D data without refraction errors are retrieved with the corrected pixel coordinates and FPP. Compared with methods that need to determine the transmission trajectory of light and/or provide feature information for a refractive interface, the proposed method is simple and easy-to-implement, because the complicated and hard-to-implement processes of ray tracing and manually pasting features onto the interface are removed. Two experiments, including 3D shape measurement of a standard step and 3D shape measurement of a spherical object, are conducted to demonstrate the performance of the proposed refraction error compensation method based on PD-LUT.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 19","pages":"6044-6047"},"PeriodicalIF":3.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145207141","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

A thiol-ene-based HPDLC grating with s-polarizationdominated diffraction. s偏振主导衍射的巯基HPDLC光栅。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.573249

Wenbo Mu, Feirong Liu, Run Tian, Penglei Li, Yulan Fu, Yiwei Zhang, Jinxin Guo, Xinping Zhang

{"title":"A thiol-ene-based HPDLC grating with s-polarizationdominated diffraction.","authors":"Wenbo Mu, Feirong Liu, Run Tian, Penglei Li, Yulan Fu, Yiwei Zhang, Jinxin Guo, Xinping Zhang","doi":"10.1364/OL.573249","DOIUrl":"https://doi.org/10.1364/OL.573249","url":null,"abstract":"Holographic Polymer-Dispersed Liquid Crystal (HPDLC) gratings exhibit excellent electro-optical performances due to their unique optical characteristics and tunability. However, the previously reported HPDLC gratings where thep-polarization response dominates in their diffraction, i.e., the diffraction efficiency of HPDLC gratings in p-polarization is much larger than that in s-polarization. This Letter reports a thiol-ene monomer-based HPDLC grating, which exhibits a high s-polarization diffraction efficiency rather than p-polarization. The dependence of refractive index modulation (Δn) on recording intensity and liquid crystal (LC) doping concentration is experimentally investigated. The results show that Δn is able to reach as high as 1.93 × 10-2 in s-polarization and 1.21 × 10-2 in p-polarization with an optimum recording condition. Combining with the morphology examinations, the results imply that the Δn strongly depends on the ratio of LC-rich and polymer-rich phases in the grating. Moreover, we confirm that a lower recording intensity leads to a larger LC droplet size formed by holographic recording and thereby results in a decrease in threshold driving voltage of HPDLC gratings. We believe that the finding of s-polarization-dominated diffraction in the proposed thiol-ene photopolymer provides a new direction for HPDLC grating design.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 19","pages":"6052-6055"},"PeriodicalIF":3.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145207152","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

Topographic measurement of encapsulated microstructures via active wavefront-compensatory coherence scanning interferometry. 利用有源波前补偿相干扫描干涉测量封装微结构的形貌。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.569289

Zhiyi Xu, Zhishan Gao, Jiale Zhang, Xiaoxin Fan, Xiao Huo, Zhongxuan Hou, Zhenyan Guo, Qun Yuan

引用次数: 0

High-sensitivity chirped-pulse-pair φOTDR operated at the milli-hertz frequency band. 高灵敏度啁啾脉冲对φOTDR工作在毫赫频带。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.572127

Pengbai Xu, Jinhui Lian, Junjie Zhu, Zhigeng Ye, Xinfeng Yu, Kunhua Wen, Songnian Fu, Jun Yang, Yuwen Qin

{"title":"High-sensitivity chirped-pulse-pair φOTDR operated at the milli-hertz frequency band.","authors":"Pengbai Xu, Jinhui Lian, Junjie Zhu, Zhigeng Ye, Xinfeng Yu, Kunhua Wen, Songnian Fu, Jun Yang, Yuwen Qin","doi":"10.1364/OL.572127","DOIUrl":"https://doi.org/10.1364/OL.572127","url":null,"abstract":"Ultra-low-frequency acoustic wave detection has significant applications in seismic wave monitoring, oil-gas exploration, and ocean observation. However, those waves often exhibit large amplitude variations that exceed the dynamic of phase-sensitive optical time-domain reflectometry (φOTDR). Although the recently proposed chirped-pulse-pair (CPP) φOTDR scheme offers an extension of measurement range, its capability for ultra-low-frequency detection has yet to be explored. Here, we experimentally demonstrate a high-sensitivity of CPP-φOTDR operated at the milli-hertz frequency band. Initially, the CPP technique is employed to mitigate noise that accumulates during the reference trace updating. Meanwhile, an integrated adaptive filtering is applied to further reduce the noise floor, enabling the detection of acoustic signals at the milli-hertz band. As a result, the ultra-low-frequency sensitivity, after a continuous 20-hour measurement, can reach 6.6 nε/√Hz at 4 mHz, which is the highest sensitivity record at the milli-hertz frequency band that is compatible with the existing communication cables, to the best of our knowledge.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 19","pages":"5973-5976"},"PeriodicalIF":3.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145207253","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