Applied Optics and Photonics China最新文献_第2页

High-frequency broadband radar signal generation based on optical frequency comb 基于光学频率梳的高频宽带雷达信号生成技术

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3005263

Ma Xi, Weigang Zhao, Xiangang Song, Duan Bo, Qinggui Tan

引用次数: 0

Experimental study on chemical mechanical polishing of LNOI surfaces LNOI 表面化学机械抛光实验研究

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3004109

Xutao Zhang, Jianfeng Bao, Feng Yang, Ziyang Li, Dengcai Yang

{"title":"Experimental study on chemical mechanical polishing of LNOI surfaces","authors":"Xutao Zhang, Jianfeng Bao, Feng Yang, Ziyang Li, Dengcai Yang","doi":"10.1117/12.3004109","DOIUrl":"https://doi.org/10.1117/12.3004109","url":null,"abstract":"In recent years, lithium niobate (LiNbO3) has been widely used in optical fiber communication, quantum communication, fiber optic gyroscopes and microwave photonics as an important photonic material. Lithium niobate on insulator (LNOI) has attracted much attention as an emerging photonic integrated material. Compared with traditional lithium niobate crystal materials, LNOI materials have the ability to realize miniaturized photonic devices with higher efficiency and lower energy consumption, thus showing great potential in the design and manufacture of photonic devices. However, due to the high hardness and inactive chemical properties of LNOI materials, the traditional semiconductor process cannot process its nanostructures, which limits the optimization of the key performance indicators of the device, thus hindering the further development of high-quality and miniaturized LNOI optoelectronic functional devices. In the preparation process of the LNOI waveguide, the sidewall of the ridge waveguide formed by etching is often not flat enough, which may lead to an increase in light scattering loss. To solve this problem, surface polishing technology, especially chemical mechanical polishing (CMP), has become an important method. Polishing the surface of the LNOI device by CMP can reduce the roughness of the waveguide sidewall after etching, improve the performance and power transmission efficiency of the device, and ensure that the sidewall surface is flat and smooth to achieve the minimum optical coupling loss and maximum power transmission.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138995616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Suppression of time-delayed signature in chaotic signals based on optoelectronic hybrid feedbacks 基于光电混合反馈抑制混沌信号中的时延特征

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3007457

Ziwei Xu, Zhen Zeng, Zhiyao Zhang, Yong Liu

{"title":"Suppression of time-delayed signature in chaotic signals based on optoelectronic hybrid feedbacks","authors":"Ziwei Xu, Zhen Zeng, Zhiyao Zhang, Yong Liu","doi":"10.1117/12.3007457","DOIUrl":"https://doi.org/10.1117/12.3007457","url":null,"abstract":"A novel approach to suppressing the time-delayed signature (TDS) in chaotic signals from the semiconductor laser (SCL) is proposed and experimentally demonstrated based on the optoelectronic hybrid feedback. Through combining the distributed feedback in the chirped fiber Bragg grating (CFBG) with the nonlinear optoelectronic feedback provided by the microwave photonic link, a low-TDS chaotic oscillation is successfully built up in the SCI cavity. Thanks to the employment of the nonlinear optoelectronic feedback, the proposed scheme can generate low TDS chaotic signals by using a CFBG with a much smaller grating dispersion coefficient of about 22.3 ps/nm compared with the scheme relying solely on the distributed feedback (i.e., 2000 ps/nm). In addition, different from the broadband optoelectronic oscillator, there is almost no stringent requirement of the extremely high net gain of the microwave photonic link. In the proof-of-concept experiment, the chaotic signal generated by the proposed scheme has a much lower TDS of about 0.05, a higher PE of 0.9978, and a better spectral flatness of 8 dB, compared with the conventional distributed feedback laser.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138963553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation research on coherent detection of pulsed laser based on LFM 基于 LFM 的脉冲激光相干探测模拟研究

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3002148

Yuan Ye, Jingguo Zhu, Chenghao Jiang, Zhihong Hu, Yuhua Jiang, Ru-qing Liu, Zhonghe Liu

{"title":"Simulation research on coherent detection of pulsed laser based on LFM","authors":"Yuan Ye, Jingguo Zhu, Chenghao Jiang, Zhihong Hu, Yuhua Jiang, Ru-qing Liu, Zhonghe Liu","doi":"10.1117/12.3002148","DOIUrl":"https://doi.org/10.1117/12.3002148","url":null,"abstract":"Aiming at the problem that the laser coherent detection system is easy to be annihilated in the noise in the long-distance and complex environment, resulting in the system unable to extract effective information, In this paper, the pulse compression theory and matched filter principle are analyzed, and a target high-precision matched filter LFM system model suitable for laser coherent detection is proposed, by transmitting a linear frequency modulation signal, combined with the matched filter algorithm to process the echo signal, realizes the target distance solution under the condition of low signal-to-noise ratio. At the same time, the influence of FM bandwidth on the multi-target extractionability under different SNR is studied, and the FM bandwidth-ranging accuracy model is established. Compared with the ordinary windowing algorithm, by increasing the system FM bandwidth, it can be effective in extremely low signal-to-noise ratios. Extract multi-target distance values. The simulation results show that under the condition of -40 dB signal-to-noise ratio, setting the frequency modulation bandwidth to 4 GHz can effectively achieve multi-target detection, and the ranging accuracy can reach 4.5 mm.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138963590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Demonstration of 112Gb/s PAM4/6 signal transmission in IM/DD systems using MLSE 利用 MLSE 在 IM/DD 系统中演示 112Gb/s PAM4/6 信号传输

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3005746

Yao Xie, Na Li, Wei Li, Peili He, Zhongshuai Feng, Hua Zhang, Chaonan Yao

引用次数: 0

Optical design of an underwater wide working distance robot vision lens 水下宽工作距离机器人视觉镜头的光学设计

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3005306

Ruikang Li, Da Mu, Yongjun Hao, Peng Chen

{"title":"Optical design of an underwater wide working distance robot vision lens","authors":"Ruikang Li, Da Mu, Yongjun Hao, Peng Chen","doi":"10.1117/12.3005306","DOIUrl":"https://doi.org/10.1117/12.3005306","url":null,"abstract":"The continuous exploration of the ocean boosts an increasing use of optical means to guide underwater object grasping or underwater docking. In this paper, an underwater wide working distance lens is designed, which is suitable when accurate guidance by machine vision at close range is needed. The lens is adaptable for underwater manipulator grabbing the target, docking of unmanned underwater vehicles and so on. The commonly used sonar guidance methods for underwater long-distance work are difficult to meet the accuracy of close-range work. The method of optical guidance is also affected by factors such as water's absorption and scattering of light, and can only work at close distances. Combining the limitations of both, the designed working distance of this system is within the range of 0.1-10 m, and the use of polarization can further improve the effectiveness of underwater imaging. In view of the effects of seawater refractive index, water pressure, total length limit, and water temperature in the seawater use environment, this paper designs an underwater lens with the maximum working depth of 1500 meters and the working water temperature of 0-30 degrees. The lens is designed with flat underwater optical window and 10 spherical elements in 8 groups. The diagonal field of view (FoV) in water is 35 degrees, F-number (F/#) of 1.8, and the total length is less than 70mm, which is used with the polarization image sensors of 2/3inch optical format. The good imaging quality of the lens satisfies the MTF greater than 0.4@145lp/mm in the whole working distance.","PeriodicalId":298662,"journal":{"name":"Applied Optics and Photonics China","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138964325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Morphing behavior of a piezoelectric deformable mirror under complex environment for space active optics 用于空间主动光学的压电可变形镜在复杂环境下的变形行为

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3007900

Yuxuan Gong, Yian Yu, Kainan Wang

引用次数: 0

Development trend and integrated design of liquid launch vehicle 液体运载火箭的发展趋势和综合设计

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3008122

Haoliang Yang

引用次数: 0

Ultrafast pulse generation via magnetic topological insulator MnBi2Te4 nanosheets 通过磁性拓扑绝缘体 MnBi2Te4 纳米片生成超快脉冲

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3005487

Haiqin Deng, Qiang Yu, Zixin Yang, Jian Wu, Pu Zhou

引用次数: 0

A monocular 3D imaging system based on polarization-sensitive metalens 基于偏振敏感金属膜的单目三维成像系统

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3002537

Xueqi Chen, Lurui Xia, Sen Li, Yi Liu, Xuanwen Yang, Jijian Hu, Yan Lu

引用次数: 0