Photonics and Optoelectronics Meetings最新文献_第6页

10 Mbps in-plane green light communication system made by InGaN/GaN MQWs device 采用InGaN/GaN mqw器件制作的10 Mbps平面内绿光通信系统

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2672858

Fujun Zhu, Jia-lei Yuan, Xumin Gao, Yongjin Wang, Haitao Zhao, Zheng Shi

{"title":"10 Mbps in-plane green light communication system made by InGaN/GaN MQWs device","authors":"Fujun Zhu, Jia-lei Yuan, Xumin Gao, Yongjin Wang, Haitao Zhao, Zheng Shi","doi":"10.1117/12.2672858","DOIUrl":"https://doi.org/10.1117/12.2672858","url":null,"abstract":"In this work, we demonstrate a green light in-plane communication system at 557 nm through a monolithic integration of two same structure MQWs devices-LED and PD, and waveguides on a GaN-on-Si wafer with InGaN/GaN superlattice layer. The MQW structures are responsible for the emission in the LED and photodetection in the PD. In addition, the device have the ability of luminescing and detecting simultaneously in quantum wells. The front side of device is completed by using e-beam evaporation, photolithography, etching. Since Si substrate is unfavorable for optical transmission due to strong visible light absorption. One last step is stripping of the Si substrate to increase the signal intensity received at the receiving side. As on-chip free-space transmission is hard to achieve due to the omnidirectional emission of LED, the installation of waveguides between LED and PD is beneficial for efficient transmission of optical signals. The optical and electrical properties of this communication system are characterized through series of measurement. To practically cognize the ability of transmission of the communication system, we use the system achieveing an in-panle transmission of PRBS signals modulated by non-return-to-zero on-off-keying (NRZ-OOK) at the speed of 10 Mbps, then analyze the result and the influence of other system factors such as resistive-capacitive (RC) time constant and junction capacitance of the receiver. According to the analysis of results, the system is able to transmitted and received PRBS signals at a rate of 10 Mbps.","PeriodicalId":422113,"journal":{"name":"Photonics and Optoelectronics Meetings","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128138569","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

Generation and detection of terahertz quasi-perfect vortex beam arrays 太赫兹准完美涡旋光束阵列的产生与探测

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2672852

Xingyun Wang, Yongqiang Yang, Kejia Wang, Zhengang Yang, Jinsong Liu

引用次数: 0

Design of optical disk drive servo channel 光盘驱动器伺服通道的设计

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2672743

Chen Xie, Haibo Wang, Hui Chen

引用次数: 0

Enhanced ultra-broadband metamaterial absorber enabled by anti-reflection coating 增透涂层增强超宽带吸收材料

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2672603

Dongqing Wu, Lei Lei

{"title":"Enhanced ultra-broadband metamaterial absorber enabled by anti-reflection coating","authors":"Dongqing Wu, Lei Lei","doi":"10.1117/12.2672603","DOIUrl":"https://doi.org/10.1117/12.2672603","url":null,"abstract":"High-performance optical absorbers have garnered great interest because of their wide applications in solar thermophotovoltaic systems, sensors, photo-thermal modulators, etc. In this work, we experimentally realize an omnidirectional ultra-broadband metamaterial absorber with a 90% absorption bandwidth from 440-2124 nm and an average absorption higher than 95%. The peak absorption reaches up to 99.57%. Apart from multiple substructures in the pattern layer, which preliminarily broadens the absorption bandwidth due to the corresponding multiple resonance modes, a silica anti-reflection layer is additionally coated on the top to manipulate the impedance of the nanostructure to match that of the air. Physical mechanism is discussed in detail in the paper. With the assistance of the anti-reflection coating, the proposed nanostructure exhibits an increase of the absorption bandwidth by more than 590 nm while maintains high average absorptance. The anti-reflection layer can be replaced with silicon nitride to broaden the absorption bandwidth further. Nearly angle-independent spectral performance for both TE and TM polarizations are observed in both case. Moreover, for the fabrication, only one electron beam lithography is required to construct the metasurface atoms, eliminating the process of multiple lithography or pattern alignment. The proposed absorber shows a promising prospect in versatile utilizations such as solar energy harvesting, thermal emitters, photodetectors, and so on.","PeriodicalId":422113,"journal":{"name":"Photonics and Optoelectronics Meetings","volume":"186 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125167880","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

A smartphone based portable biochemical sensor for detecting hypochlorite 一种基于智能手机的便携式次氯酸盐检测生化传感器

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2672905

Changfei Lai, Ting Liu

{"title":"A smartphone based portable biochemical sensor for detecting hypochlorite","authors":"Changfei Lai, Ting Liu","doi":"10.1117/12.2672905","DOIUrl":"https://doi.org/10.1117/12.2672905","url":null,"abstract":"Fluorescence sensors have been defined as an important detection method due to their high sensitivity, low detection limit, strong intuition, simple operation, and wide application range. This detection method has wide application value in the detection of various ions and molecules. However, the current fluorescence sensors require complex optical components and systems, which make them expensive and bulky. Here, we propose a portable fluorescence sensor. The sensor mainly consists of two modules: fluorescence excitation and fluorescence signal acquisition. The excitation light is generated by a small laser, and the transmission of excitation light and fluorescence is realized by a Y-type optical fiber coupler. Finally, the signal is collected by the smartphone. The visualization operation is realized by building a smartphone APP, the fluorescent image is processed by digital image processing technology, and the biochemical quantitative detection is realized by calculating the gray value change of the fluorescent signal. Hypochlorite is the most active and widely used chlorine compound in chlorides. It can effectively inactivate microbial cells suspended in water, thereby achieving sterilization of water. Therefore, hypochlorite is widely used as a water bactericide, but too much hypochlorite will cause certain damage to cells and tissues in the human body. As a commonly used fluorescent dye, coumarin has a wide range of applications in biochemical detection due to its good fluorescence spectrum. Among them, 7-diethylamino-4 methyl coumarin will react with hypochlorite to produce fluorescence quenching. Therefore, it can be used for quantitative detection of hypochlorite content in water. Experiments show that the sensor can quickly detect the concentration of hypochlorite, not only has high sensitivity and low detection limit, but also has good accuracy. Because of its small size, simple operation, cost-effectiveness, and on-site detection, the instrument is expected to be used in the detection of in vivo cells and has a good development prospect.","PeriodicalId":422113,"journal":{"name":"Photonics and Optoelectronics Meetings","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123796584","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

Compressive sampling of RF chirp signals with multimode fiber and photonic time stretch 基于多模光纤和光子时间拉伸的射频啁啾信号压缩采样

Photonics and Optoelectronics Meetings Pub Date : 2023-04-10 DOI: 10.1117/12.2672767

Zeyang Ye, Zhenming Yu, Le-Nian Xu, Ning Zhan, Hongyu Huang, Kun Xu

引用次数: 0

Viscosity-driven flexible 2D Ag nanowire/PVA film, converted from 3D hybrid hydrogel 黏度驱动的柔性二维银纳米线/聚乙烯醇薄膜，由三维混合水凝胶转化而成

Photonics and Optoelectronics Meetings Pub Date : 2022-01-21 DOI: 10.1117/12.2626591

Weizhe Wang, Zhimou Xu

引用次数: 0

Synthesis and characterization of porous anodic aluminum oxide with precise controllable pore diameter 孔径精确可控多孔阳极氧化铝的合成与表征

Photonics and Optoelectronics Meetings Pub Date : 2022-01-21 DOI: 10.1117/12.2626542

Xue Zheng, Zhimou Xu

引用次数: 0

Design and characterization of long path absorption cell and digital lock-in amplifier for multi-channel infrared gas sensor 用于多通道红外气体传感器的长路径吸收单元和数字锁相放大器的设计与表征

Photonics and Optoelectronics Meetings Pub Date : 2022-01-21 DOI: 10.1117/12.2626593

Pai Jiang, Yunbo Zhang, Yuhao Qian, Aolong Sun, Kaiyuan Wang, Lingjie Li, Kaiyun Cao, Jian-Han Lai

引用次数: 0

Nonlinear trellis-coded precoding for MISO visible light communication system MISO可见光通信系统的非线性栅格编码预编码

Photonics and Optoelectronics Meetings Pub Date : 2022-01-21 DOI: 10.1117/12.2626472

Zengyi Xu, Wenqing Niu, N. Chi

{"title":"Nonlinear trellis-coded precoding for MISO visible light communication system","authors":"Zengyi Xu, Wenqing Niu, N. Chi","doi":"10.1117/12.2626472","DOIUrl":"https://doi.org/10.1117/12.2626472","url":null,"abstract":"Multiple-Input-Single-Output (MISO) is a promising application for visible light communication (VLC) system, which is featured in large user capacity, but also suffers from the nonlinearity problem introduced by the light emitting diode (LED) itself and the signal superposition at the receiver. In this article, to suppress the negative effect of nonlinearity in MISO VLC system that utilizes superposition modulation, we proposed a solution that applies Nonlinear Trellis-Coded Precoding (NL-TCP) to shape the spectrum and constellation diagram of the original PAM-4. A PAM-6 signal converted from PAM- 4 by NL-TCP algorithm successfully lowers its BER under the threshold for 7% FEC and supports up to 1.1 Gb/s data rate within severe nonlinearity, while the conventional PAM-4 modulation fails to meet the threshold requirement. The maximum improvement in Q-factor recorded is 1.2dB at the data rate of 1 Gb/s. In comparison, NL-TCP is more sensitive to the data rate, but it has a more desirable robustness against the nonlinearity in the channel. This experiment verifies the practical benefit of NL-TCP in high nonlinearity channel. It is believed that this research is significative for the researchers who are aimed at establishing a usable link, yet have to tolerate the nonlinearity to exist in the channel.","PeriodicalId":422113,"journal":{"name":"Photonics and Optoelectronics Meetings","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126909864","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