International Conference on Optical Instruments and Technology最新文献_第2页

Research on effective optical path length ratio of hollow waveguide for optical gas sensors 光学气体传感器中空波导有效光程长度比研究

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2611948

Liming Yuan, Z. Du, Kebin Tong, Jinyi Li

{"title":"Research on effective optical path length ratio of hollow waveguide for optical gas sensors","authors":"Liming Yuan, Z. Du, Kebin Tong, Jinyi Li","doi":"10.1117/12.2611948","DOIUrl":"https://doi.org/10.1117/12.2611948","url":null,"abstract":"Hollow waveguide (HWG) as an absorption cell for gas spectral sensing has the advantages of low transmission loss, fast response speed, and high path length to volume ratio. However, the transmission of laser beams in HWGs relies on the multiple reflections by the inner wall, and it makes the path length of laser beams emitted from HWGs unequal, thereby limiting the high-precision measurement of gas concentration. Two mathematical models were established based on geometric optics to characterize the effective path length ratio (EPLR) distribution of the laser beam emitted from a straight HWG and a bent HWG, respectively. The effects of HWG parameters and incident conditions on EPLR distribution was investigated, and quantitative analysis was carried out. Experimental verification was performed by basing heterodyne interferometry. A formula to calculate the equivalent path length ratio of a laser beam propagating in an HWG was given, which simplifies the complicated calculation caused by the path length not unique and demonstrates 1-6% reduction in measurement error. The proposed method has guiding significance for high-precision measurement of absorption spectroscopy, and can extend to both substrate-integrated HWG (iHWG) and liquid waveguide capillary cell (LWCC) based optical sensors.","PeriodicalId":201899,"journal":{"name":"International Conference on Optical Instruments and Technology","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133431843","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

Highly coherent linearly-swept fiber laser based on composite optical phase-locked loop 基于复合光锁相环的高相干线扫光纤激光器

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2620470

Yinxia Meng, Weilin Xie, Yuxiang Feng, Wei Wei, Yi Dong

引用次数: 0

Accurate Resistance Measurement of Composite Materials for Flexible Devices 柔性器件用复合材料电阻的精确测量

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2616351

Xingyi Wu, Wenhua Gu, Yutao Yue, Wen Wu

引用次数: 0

Continuously bandwidth-tunable nonlinear polarization rotation mode-locked fiber laser 连续带宽可调非线性偏振旋转锁模光纤激光器

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2620401

Yong-Wen Zheng, Ya Liu, X. Tan, Z. Xie

{"title":"Continuously bandwidth-tunable nonlinear polarization rotation mode-locked fiber laser","authors":"Yong-Wen Zheng, Ya Liu, X. Tan, Z. Xie","doi":"10.1117/12.2620401","DOIUrl":"https://doi.org/10.1117/12.2620401","url":null,"abstract":"Developing ultrafast lasers with controllable flexible pulses, such as wavelength and pulsewidth tunable lasers are desired for various applications like fiber telecommunication and optical sensing. To achieve wavelength or/and pulsewidth tunability in saturable absorber (SA) based mode-locked fiber lasers, some technologies including tunable band pass filter, fiber Bragg grating, diffraction grating mirror, 45°tilted fiber grating, and tunable Lyot filter are proposed to provide the direct spectral manipulation of the pulses. In this paper, we demonstrate a simple bandwidth-tunable ultrashort pulse generation scheme for a nonlinear polarization rotation mode-locked laser. By utilizing a polarization-maintaining-fiber-pigtailed inline polarizer and a polarization controller, a nonlinear polarization evolution (NPE) mode-locking effect as well as a bandwidth-tunable Lyot filter are enabled in the laser cavity when the intracavity polarization settings adjusted. The Lyot filter formed by the inline polarizer and its birefringence of the two fiber pigtails with lengths of 0.3 m could introduce a spectral filtering effect. By only tuning the intracavity polarization controller, the spectral bandwidth is continuously tuned in the range of 7.8 to 3.5 nm. We attribute the lower limit of the spectral bandwidth to the nonlinear self-phase modulation requiring narrow pulses in nonlinear polarization rotation mode-locked lasers. These results provide a simple way for generating subpicosecond pulse with variable spectral bandwith or pulse duration without using a saturable absorber.","PeriodicalId":201899,"journal":{"name":"International Conference on Optical Instruments and Technology","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116166970","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

Transition of optical fiber delay coefficient under the action of fiber coating at low temperature 低温下光纤涂层作用下光纤延迟系数的跃迁

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2620405

Di Jiang, Jun Su, Zhiqiang Fan, Q. Qiu

引用次数: 0

A few mode fiber temperature sensor with double gourd structure 双葫芦结构的少模光纤温度传感器

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2620675

Xinghu Fu, Jiahao Zhou, Ming Xu, Yufan Wang, W. Jin, G. Fu, W. Bi

引用次数: 0

Microwave angle-of-arrival measurement utilizing photonic real-time Fourier transformation 利用光子实时傅里叶变换的微波到达角测量

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2620740

Z. Wang, Dan Zhu, Bowen Zhang, Jiewen Ding, S. Pan

引用次数: 0

Demonstration of real-time full-duplex photonic-assisted mm-wave communication in Ka-band based on the narrow-band envelope detector 基于窄带包络探测器的ka波段实时全双工光子辅助毫米波通信演示

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2616445

S. Liang, Y. Cai, Jiaxin Zhang, M. Lei, B. Hua, L. Zhang, M. Sun, L. Tian, A. Li, Y. Zou, G. Zhao, L. Ma, M. Zhu

{"title":"Demonstration of real-time full-duplex photonic-assisted mm-wave communication in Ka-band based on the narrow-band envelope detector","authors":"S. Liang, Y. Cai, Jiaxin Zhang, M. Lei, B. Hua, L. Zhang, M. Sun, L. Tian, A. Li, Y. Zou, G. Zhao, L. Ma, M. Zhu","doi":"10.1117/12.2616445","DOIUrl":"https://doi.org/10.1117/12.2616445","url":null,"abstract":"With the large-scale commercialization of 5G and the continuous evolution of the ultra-high-definition video industry, the next five years will be a period of strategic opportunities for the technological development and achievement transformation of the ultra-high-definition video industry. 5G mm-wave such as 28GHz in Ka-band will drive the rapid development of ultra-high-definition video industry applications. In this paper, we experimentally demonstrate a real-time full-duplex photonic-assisted 28GHz mm-wave communication system for video services. The experimental results show that our system supports real-time data error-free transmission of 1.25Gbaud and bit error rate level of 10-12 at 2.125 Gbaud under the case of 5km fiber and 1.6m wireless distances. Additionally, we also demonstrate the real-time full-duplex transmission of 1080p uncompressed video with the overall bandwidth of 1.485Gbps. It means this system can enable at least 8 channels of 8K video or 20 channels of 4K video to be live and on-demand at the same time after using video compression techniques. According to the above results, we believe that this system can promote the development of 5G mm-wave real-time ultra-high-definition video services for indoor or outdoor scenarios.","PeriodicalId":201899,"journal":{"name":"International Conference on Optical Instruments and Technology","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124238802","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

Single-lane 200G+ high speed optical transmission using single-DAC for data center interconnects 单线200G+高速光传输采用单dac进行数据中心互连

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2616414

Jiao Zhang, M. Zhu

{"title":"Single-lane 200G+ high speed optical transmission using single-DAC for data center interconnects","authors":"Jiao Zhang, M. Zhu","doi":"10.1117/12.2616414","DOIUrl":"https://doi.org/10.1117/12.2616414","url":null,"abstract":"Propelled by bandwidth-hungry cloud services, the ongoing growth of intra-datacenter traffic drives the development of high-speed short-reach transceivers, which calls for next generation optical interfaces of 800-GE or even 1.6-TbE. Conventional intensity-modulation direct-detection (IM/DD) systems still dominate the market for high speed short reach optical interconnects due to its simplicity and low cost compared with coherent solutions. Several advanced techniques to achieving net data rates around 200∼250 Gbps have been demonstrated. Effective digital signal processing (DSP) for signal recovery are always used in these systems, including digital pre-distortion, digital timing recovery, feed-forward and decision feedback equalization (FFE/DFE) and stronger forward error correction. Probabilistic shaping (PS) has been introduced for 200G+ per lane IM/DD systems. Semiconductor optical amplifier (SOA) and PS can be potentially used for 200G+ per lane IM/DD systems at O-band over 10 km SMF. There are two main transmission impairments: the nonlinear impairments from the nonlinear region of the electro-optical components, and linear impairments from the bandwidth constraint of the optoelectronic devices and chromatic dispersion. Single-lane 200G+ transmission is difficult to realize due to the nonlinear impairments and the strong bandwidth constraint of optoelectronic devices. In recent years, we have experimentally demonstrated several 200G+ per lane IM/DD short-reach transmission system, making it a promising scheme for data center short-reach applications.","PeriodicalId":201899,"journal":{"name":"International Conference on Optical Instruments and Technology","volume":"368 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127586948","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

Three-wavelength mode converter based on three-cascaded tilted sampled Bragg gratings 基于三级联倾斜采样布拉格光栅的三波长模式变换器

International Conference on Optical Instruments and Technology Pub Date : 2022-07-26 DOI: 10.1117/12.2620608

Xintao Zeng, Yuxin Ma, Ziming Hong, Hongji Wang, Pinghui Wu, Yue-chun Shi, Xiangfei Chen

引用次数: 0