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Water track laser Doppler velocimeter [Invited] 水迹激光多普勒测速仪[特邀]
2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.090005
� 黄, � 王, 志毅 �, 晓明 �, � 周, 晖 罗
{"title":"Water track laser Doppler velocimeter [Invited]","authors":"è�£ 黄, ç�¦ 王, 志毅 å�‘, 晓明 è�‚, å�¥ 周, æ™– ç½—","doi":"10.3788/col202321.090005","DOIUrl":"https://doi.org/10.3788/col202321.090005","url":null,"abstract":"A water track laser Doppler velocimeter (LDV) is developed with advantages of high update rate, high real-time performance, high concealment, light weight, and small dimensions. The water track LDV measures the advance velocity of the under-water vehicle with respect to the surrounding water. The experimental results show that the water track LDV has an accuracy of 96.4% when the moving velocity of the vehicle with respect to the ground exceeds 0.25 m/s. Thus, the water track LDV is promising in the application of underwater navigation to aid the strapdown inertial navigation system.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135600661","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
Low-loss, high-purity, and ultrabroadband all-fiber LP41 mode converter employing a mode-selective photonic lantern [Invited] 采用模式选择光子灯的低损耗、高纯度、超宽带全光纤LP41模式转换器[特邀]
2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.110008
Liang Chen, Huiyi Guo, Zekun Shi, Wenzhe Chang, Boyu Chen, Zhi Wang, Yan-ge Liu
{"title":"Low-loss, high-purity, and ultrabroadband all-fiber LP41 mode converter employing a mode-selective photonic lantern [Invited]","authors":"Liang Chen, Huiyi Guo, Zekun Shi, Wenzhe Chang, Boyu Chen, Zhi Wang, Yan-ge Liu","doi":"10.3788/col202321.110008","DOIUrl":"https://doi.org/10.3788/col202321.110008","url":null,"abstract":"Broadband mode converters are essential devices for space-division and wavelength-division multiplexing systems. There are great challenges in the generation of higher-order modes above the third order with low loss and high mode purity employing all-fiber devices. In this paper, an all-fiber LP41 mode converter is proposed and fabricated by tapering a nine-core single-mode fiber bundle. Experimental results indicate that this all-fiber LP41 mode converter is low-loss, high-purity, and ultrabroadband. The insertion loss is less than 0.4 dB. The purity of odd LP41 at 1310 nm is 95.09%, and the operating bandwidth exceeds 280 nm.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135612365","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
Ultrabroadband chiral metasurface for linear polarization conversion and asymmetric transmission based on enhanced interference theory 基于增强干涉理论的线偏振转换和非对称传输超宽带手性超表面
2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.113602
Jingcheng Zhao, Nan Li, Yongzhi Cheng
{"title":"Ultrabroadband chiral metasurface for linear polarization conversion and asymmetric transmission based on enhanced interference theory","authors":"Jingcheng Zhao, Nan Li, Yongzhi Cheng","doi":"10.3788/col202321.113602","DOIUrl":"https://doi.org/10.3788/col202321.113602","url":null,"abstract":"In this paper, we propose an ultrabroadband chiral metasurface (CMS) composed of S-shaped resonator structures situated between two twisted subwavelength gratings and dielectric substrate. This innovative structure enables ultrabroadband and high-efficiency linear polarization (LP) conversion, as well as asymmetric transmission (AT) effect in the microwave region. The enhanced interference effect of the Fabry–Perot-like resonance cavity greatly expands the bandwidth and efficiency of LP conversion and AT effect. Through numerical simulations, it has been revealed that the cross-polarization transmission coefficients for normal forward (-z) and backward (+z) incidence exceed 0.8 in the frequency range of 4.13 to 17.34 GHz, accompanied by a polarization conversion ratio of over 99%. Furthermore, our microwave experimental results validate the consistency among simulation, theory, and measurement. Additionally, we elucidate the distinct characteristics of ultrabroadband LP conversion and significant AT effect through analysis of polarization azimuth rotation and ellipticity angles, total transmittance, AT coefficient, and electric field distribution. The proposed CMS structure shows excellent polarization conversion properties via AT effect and has potential applications in areas such as radar, remote sensing, and satellite communication.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135612369","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: 1
Q-switched Er3+/Dy3+ codoped ZrF4 fiber laser: continuously tunable pulse generation from 3.06 to 3.62 µm 调q Er3+/Dy3+共掺ZrF4光纤激光器:脉冲产生范围为3.06 ~ 3.62µm
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.041402
Yongzhi Wang, Hongyu Luo, Biao Wang, Jianfeng Li, Y. Liu
{"title":"Q-switched Er3+/Dy3+ codoped ZrF4 fiber laser: continuously tunable pulse generation from 3.06 to 3.62 µm","authors":"Yongzhi Wang, Hongyu Luo, Biao Wang, Jianfeng Li, Y. Liu","doi":"10.3788/col202321.041402","DOIUrl":"https://doi.org/10.3788/col202321.041402","url":null,"abstract":"","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"21 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73721188","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: 1
Intrapulse coherence degradation suppressing method of echo signal in coherent lidar 相干激光雷达回波信号脉冲内相干衰减抑制方法
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.071201
Haisheng Cong, Jianfeng Sun, Zhiyong Lu, Hongyu He, Weijie Ren, Yuxin Jiang, Lingling Xu, Chaoyang Li, Longkun Zhang, Zhengwei Zhang
{"title":"Intrapulse coherence degradation suppressing method of echo signal in coherent lidar","authors":"Haisheng Cong, Jianfeng Sun, Zhiyong Lu, Hongyu He, Weijie Ren, Yuxin Jiang, Lingling Xu, Chaoyang Li, Longkun Zhang, Zhengwei Zhang","doi":"10.3788/col202321.071201","DOIUrl":"https://doi.org/10.3788/col202321.071201","url":null,"abstract":"Aiming at coherence degradation during target detection, a suppressing method based on frequency-modulated continuous wave coherent lidar is proposed. Combined with a random iteration algorithm, a long-pulse echo signal with coherent degradation is matched with random phase noise of a certain frequency and achieves coherence restoration. Simulation and field experiment results show that this proposed method can recover the intrapulse coherence in long-pulse echo signals. In addition, for the real target echo signal at 4.2 and 19.8 km, the peak signal-to-noise ratio processed by this method is increased by 0.35 times and 4 times after pulse compression, respectively.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"3 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84934657","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
Integrated diffractive optical neural network with space-time interleaving 时空交织的综合衍射光神经网络
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.091301
Tingzhao Fu, Yuyao Huang, Run Sun, Honghao Huang, Wen Liu, Sigang Yang, Hong-wei Chen
{"title":"Integrated diffractive optical neural network with space-time interleaving","authors":"Tingzhao Fu, Yuyao Huang, Run Sun, Honghao Huang, Wen Liu, Sigang Yang, Hong-wei Chen","doi":"10.3788/col202321.091301","DOIUrl":"https://doi.org/10.3788/col202321.091301","url":null,"abstract":",","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"86 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83767325","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
NH3 laser THz emission under optical pumping by “long” (∼100 µs) CO2 laser pulses “长”(~ 100µs) CO2激光脉冲光泵浦下的NH3激光器太赫兹辐射
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.023701
A. Ionin, I. Kinyaevskiy, Y. Klimachev, A. Y. Kozlov, D. I. Kormashova, A. Kotkov, Y. Mityagin, S. Savinov, A. Sagitova, D. Sinitsyn, M. V. Ionin
{"title":"NH3 laser THz emission under optical pumping by “long” (∼100 µs) CO2 laser pulses","authors":"A. Ionin, I. Kinyaevskiy, Y. Klimachev, A. Y. Kozlov, D. I. Kormashova, A. Kotkov, Y. Mityagin, S. Savinov, A. Sagitova, D. Sinitsyn, M. V. Ionin","doi":"10.3788/col202321.023701","DOIUrl":"https://doi.org/10.3788/col202321.023701","url":null,"abstract":"","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"134 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80179811","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: 1
High-Q resonances in terahertz all-silicon metasurface with imperforated air-hole array 无孔空气孔阵列的太赫兹全硅超表面高q共振
2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.113601
Qing Wang, Pengfei Wang, Jianjun Liu, Fangzhou Shu, Guiming Pan, Zhongwei Jin, Xufeng Jing, Zhi Hong
{"title":"High-Q resonances in terahertz all-silicon metasurface with imperforated air-hole array","authors":"Qing Wang, Pengfei Wang, Jianjun Liu, Fangzhou Shu, Guiming Pan, Zhongwei Jin, Xufeng Jing, Zhi Hong","doi":"10.3788/col202321.113601","DOIUrl":"https://doi.org/10.3788/col202321.113601","url":null,"abstract":"We propose and experimentally demonstrate a high quality (Q)-factor all-silicon bound state in the continuum (BIC) metasurface with an imperforated air-hole array. The metasurface supports two polarization-insensitive BICs originated from guided mode resonances (GMRs) in the frequency range of 0.4 to 0.6 THz, and the measured Q-factors of the two GMRs are as high as 334 and 152, respectively. In addition, the influence of the thickness of the silicon substrate on the two resonances is analyzed in detail. The proposed all-silicon THz metasurface has great potential in the design and application of high-Q metasurfaces.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135448093","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 and polarization dual-multiplexed imaging based on holographic metasurfaces 基于全息超表面的波长和偏振双复用成像
2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.100501
Jilian Xu, Zhiyuan Yue, Peiyao Lu, Rui Wu, Kun Jiang, Xiquan Jiang, Shuyun Teng
{"title":"Wavelength and polarization dual-multiplexed imaging based on holographic metasurfaces","authors":"Jilian Xu, Zhiyuan Yue, Peiyao Lu, Rui Wu, Kun Jiang, Xiquan Jiang, Shuyun Teng","doi":"10.3788/col202321.100501","DOIUrl":"https://doi.org/10.3788/col202321.100501","url":null,"abstract":"In light of the powerful light manipulation ability of holographic metasurfaces, optical imaging with wavelength multiplexing and polarization multiplexing is performed in this paper. The metasurface is composed of identical rectangular nanoholes etched in silver film. Three imaging effects, including the in-plane color imaging, three-dimensional wavelength-encrypted imaging, and polarization-multiplexing wavelength-encrypted imaging, are realized. The designed metasurface has compact structure, and the obtained image has lower noise. The simulation and experiment results give the verification. Multiple images, including spatial multiplexing, wavelength multiplexing, and polarization multiplexing, exhibit immense potentialities of metasurfaces, and this work is helpful for expanding the applications of metasurfaces.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136054153","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
Room temperature continuous-wave operation of a dual-wavelength quantum cascade laser 双波长量子级联激光器的室温连续波工作
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.011408
Y. Guan, Ruixuan Sun, N. Zhuo, Xiyu Lu, Jinchuan Zhang, S. Zhai, Jun-qi Liu, Shuman Liu, Lijun Wang, Feng-qi Liu
{"title":"Room temperature continuous-wave operation of a dual-wavelength quantum cascade laser","authors":"Y. Guan, Ruixuan Sun, N. Zhuo, Xiyu Lu, Jinchuan Zhang, S. Zhai, Jun-qi Liu, Shuman Liu, Lijun Wang, Feng-qi Liu","doi":"10.3788/col202321.011408","DOIUrl":"https://doi.org/10.3788/col202321.011408","url":null,"abstract":"We report on the design and fabrication of a dual-wavelength switchable quantum cascade laser (QCL) by optimizing the design of a homogeneous active region and combining superposed distributed feedback gratings. Coaxial, single-mode emissions at two different wavelengths were achieved only through adjusting the bias voltage. Room temperature con-tinuous-wave operation with output powers of above 30 mW and 75 mW was realized for single-mode emission at 7.61 μ m and 7.06 μ m, respectively. The simplified fabrication process and easy wavelength control of our designed dual-wavelength QCL make it very attractive for developing miniature multi-species gas sensing systems.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"19 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82546437","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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