Applied Optics and Photonics China最新文献

Research on the performance improvement of microwave photonic frequency down-conversion link 微波光子频率下变频链路性能改进研究

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3006437

Xianzhi Wu, Lingjie Zhang, Zhiyao Zhang, Shang-jian Zhang, Yong Liu

{"title":"Research on the performance improvement of microwave photonic frequency down-conversion link","authors":"Xianzhi Wu, Lingjie Zhang, Zhiyao Zhang, Shang-jian Zhang, Yong Liu","doi":"10.1117/12.3006437","DOIUrl":"https://doi.org/10.1117/12.3006437","url":null,"abstract":"Performance improvement of microwave photonic frequency down-conversion link is investigated both in simulation and experiment. To achieve maximum signal-to-noise ratio, a dual-drive Mach-Zehnder modulator (DDMZM) biased at the minimum transmission point and an erbium-doped fiber amplifier (EDFA) are employed to boost the power of the first-order modulation sidebands. The power spectrum density of the output noise is limited by the thermal noise and relative intensity noise (RIN) with low and high gain of EDFA, respectively. Correspondingly, the output noise figure (NF) decreases rapidly in the case of a thermal-noise-dominant noise floor and remains stable in RIN-dominant noise floor situations. When the local oscillation (LO) and the radio frequency (RF) signal powers are set to be 10 dBm and the input optical power before photodetector (PD) is amplified to be 20 dBm, an intermediate frequency signal with a high power of 10.8 dBm is obtained. When LO/RF power is set to be 0 dBm and the amplified optical power entering the PD is 16 dBm, the NF of the proposed link is measured as 31.5 dB, which is 14 dB lower than the link without EDFA, while the conversion gain has improved to 12 dB with an increase of 57.2 dB. Finally, the spurious-free dynamic range of the link is measured as 113.3 dB·Hz 2/3 when the power of the LO signal is 0 dBm and the gain of EDFA is 18 dB.","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":"138963662","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

Lifetime properties of microchannel plate based on the (SrO, ZrO2) doped lead-silicate glass 基于（SrO、ZrO2）掺杂硅酸铅玻璃的微通道板的寿命特性

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3008052

Hua Cai, Shangtong Li, Hui Liu, Yifei Wang, Jing Ma, Tiezhu Bo, Jinsheng Jia, Chang Liu

{"title":"Lifetime properties of microchannel plate based on the (SrO, ZrO2) doped lead-silicate glass","authors":"Hua Cai, Shangtong Li, Hui Liu, Yifei Wang, Jing Ma, Tiezhu Bo, Jinsheng Jia, Chang Liu","doi":"10.1117/12.3008052","DOIUrl":"https://doi.org/10.1117/12.3008052","url":null,"abstract":"Microchannel plate (MCP) is an advanced charged particle multiplier consisted of an arrayed microchannels glass-based material, widely used in the fields of night vision intensification, time of flight mass spectrometer, and electron microscopy. For the detection of high-energy ions, inadequate resistance of ion bombardment became the main bottleneck of microchannel plate. The cladding glass was the inner-wall of microchannels and determined the foundation of the microchannel plate. In this paper, the microchannel plate with (SrO, ZrO2) doped lead-silicate cladding glass was explored in the ion bombardment-resistant properties. Cesium ion gun, laser confocal microscope, and Vacuum Photoelectron Imaging Test Facility (VPIT) were applied to investigate the ion etching, surface morphology and the lifetime of the lead-silicate glass microchannel plate, respectively. The test results are as follows: the accumulative output charge of microchannel plate with the (SrO, ZrO2) doped lead-silicate glass and the traditional lead-silicate glass was ≥19.25 C and 3.21 C, respectively. It impacted that (SrO, ZrO2) doped lead-silicate glass certainly benefited the working life of the MCP.","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":"138963679","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

Reduction of sampling rate in a time-interleaved photonic ADC for RF direct sampling 降低用于射频直接采样的时间交错光子 ADC 的采样率

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3007661

Xingwei Ye, Shen Dong, Jiquan Zhai, Yuhao Yang

引用次数: 0

Power ratio measurement of dual wavelength dye laser with picometer-level wavelength difference 具有皮米级波长差的双波长染料激光器的功率比测量

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.2692864

Yancheng Guo, Qiunan Yang, Yuanyuan Zhang

引用次数: 0

Research on suppression method of straight edge diffraction effect of mosaic grating 镶嵌光栅直边衍射效应的抑制方法研究

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3005771

Shuncheng Sun, Xinrong Chen, Chao-ming Li, Gaoxiang Xu, Tao Wu, Jiayao Pan, Lei Sun

引用次数: 0

A novel scheme of homologous differential transmissivity and reflectivity measurer 同源差分透射率和反射率测量仪的新方案

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3004230

Deng Liu, Shirong Chen, Dingbo Chen, Zhongqi Tan

{"title":"A novel scheme of homologous differential transmissivity and reflectivity measurer","authors":"Deng Liu, Shirong Chen, Dingbo Chen, Zhongqi Tan","doi":"10.1117/12.3004230","DOIUrl":"https://doi.org/10.1117/12.3004230","url":null,"abstract":"To improve the performance of differential transmissivity & reflectivity measurer (DFTRM) for coated mirrors with extremely low transmission or reflection loss, a novel scheme based on Fresnel formula and optical balance is demonstrated. Benefit from the characteristic of Fresnel formula, i.e., the specular reflectivity of the reference optical surface varies slowly with the incident angle near Brewster’s angle, so the precision measurement of transmissivity or reflectivity is then converted to the precision measurement of the incident angle in our two-optical-path scheme. An experimental system is set up to verify the feasibility of precision measurement, and the preliminary measurement results for high-reflectivity coated mirrors with low transmission loss prove its ability to measure transmissivity and distinguish the transmissivity difference of 10 parts per million (ppm) magnitude. Various potential error sources, including the responsivity of photodiodes, the scale factor, the polarization of the incident laser, the refractive index of the reference medium and the spatial relationship of components, are discussed qualitatively or quantitatively to provide guidance for the subsequent optimization of transmissivity & reflectivity measurer at ppm level in the future.","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":"138994727","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

Water-filled low-resistance optical fairing for unmanned underwater vehicles 用于无人潜航器的充水低阻光学整流罩

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3007751

Yue Zhang, Xinwei Wang, Pingshun Lei, Yan Zhou, Yuliang Liu

{"title":"Water-filled low-resistance optical fairing for unmanned underwater vehicles","authors":"Yue Zhang, Xinwei Wang, Pingshun Lei, Yan Zhou, Yuliang Liu","doi":"10.1117/12.3007751","DOIUrl":"https://doi.org/10.1117/12.3007751","url":null,"abstract":"With the increasing demand for navigation, obstacle avoidance and exploration, optical cameras are increasingly installed on unmanned underwater vehicles(UUVs). In order to meet the hydrodynamic performance requirements of UUVs, optical camera needs to be equipped inside optical fairing. However, traditional optical fairing can make optical cameras defocus and distortion, due to the difference in refractive index inside and outside the optical fairing. One of the common solutions is to replace the fairing with optical flat panel, but it will increase water resistance of UUV and affect the hydrodynamic performance. Another solution is to choose an optical camera that matches the additional focal length brought by the curvature of optical fairing, so that the optical fairing becomes a part of the camera lens. But the position of optical camera and optical fairing must be set strictly and precisely. Therefore, it is impossible to flexibly change camera, lens, optical fairing, and their positions. In this paper, a novel underwater low-resistance optical fairing is proposed. The shape of optical fairing is designed streamlined to reduce water resistance, and the water-filled structure eliminates the defocus and distortion effects caused by refractive index difference. Numerical simulations are performed to analyze the aberration and distortion caused by optical fairing. Comparison experiments of the proposed optical fairing and traditional optical fairing are performed. It is shown that the proposed fairing is simple in structure and flexible in implementation, which can enable clear imaging of optical cameras, and can be easily installed to achieve better hydrodynamic performance of UUVs.","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":"138994838","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

Influence of deformed window glass for GaAs photocathode on light transmission 用于砷化镓光电阴极的变形窗玻璃对透光率的影响

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3007947

Xin Guo, Feng Shi, Tiantian Jia, Ruoyu Zhang, Hongchang Cheng, Yijun Zhang

引用次数: 0

Analysis of the key techniques in polarization feature extraction and correction 偏振特征提取和校正关键技术分析

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3005397

Chengguang Cui, Xiaohong Zhang, Xiaolin Liu, Mengxu Li, Shengjie Zhang

引用次数: 0

Source of entangled photon pairs generated by low-power pump laser 低功率泵浦激光器产生的纠缠光子对源

Applied Optics and Photonics China Pub Date : 2023-12-18 DOI: 10.1117/12.3006764

Tianxuan Feng, Tong Wu, Shuyuan Zhang, Zhiying Song, Lijing Li

引用次数: 0