机构

• 上海光学精密机械研究... [6]
• 长春光学精密机械与物... [1]
• 光电技术研究所 [1]
• 高能物理研究所 [1]
• 上海技术物理研究所 [1]
• 西安光学精密机械研究... [1]
• 更多

采集方式

• OAI收割 [11]

内容类型

• 期刊论文 [9]
• 会议论文 [1]
• 学位论文 [1]

发表日期

• 2023 [1]
• 2020 [1]
• 2019 [1]
• 2017 [1]
• 2016 [1]
• 2014 [2]
• 更多

学科主题

• 光学工程 [1]
• 光通信 [1]

筛选

浏览/检索结果: 共11条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 PMD tolerant transmission using multiple optical phase conjugators in the discretely amplified systems 期刊论文  OAI收割 Journal of Optical Communications, 2023 作者:  Tong, Xiaogang;  Cao, Weiwei;  Zhang, Junsheng;  Liang, Haijian   |  收藏  |  浏览/下载：13/0  |  提交时间：2023/11/02 optical fiber communications  coherent detection  optical phase conjugation  digital back-propagation  polarization mode dispersion   No pulsed radio emission during a bursting phase of a Galactic magnetar 期刊论文  OAI收割 Nature, 2020, 卷号: 587, 页码: 63-65 作者:  HXMT   |  收藏  |  浏览/下载：44/0  |  提交时间：2022/02/08 Astrophysics - High Energy Astrophysical Phenomena  Abstract: Fast radio bursts (FRBs) are millisecond-duration radio transients of unknown physical origin observed at extragalactic distances1-3. It has long been speculated that magnetars are the engine powering repeating bursts from FRB sources4-13, but no convincing evidence has been collected so far14. Recently, the Galactic magnetar SRG 1935+2154 entered an active phase by emitting intense soft íray bursts15. One FRB-like event with two peaks (FRB 200428) and a luminosity slightly lower than the faintest extragalactic FRBs was detected from the source, in association with a soft íray/hard-X-ray flare18-21. Here we report an eight-hour targeted radio observational campaign comprising four sessions and assisted by multi-wavelength (optical and hard-X-ray) data. During the third session, 29 soft-íray repeater (SGR) bursts were detected in íray energies. Throughout the observing period, we detected no single dispersed pulsed emission coincident with the arrivals of SGR bursts, but unfortunately we were not observing when the FRB was detected. The non-detection places a fluence upper limit that is eight orders of magnitude lower than the fluence of FRB 200428. Our results suggest that FRB-SGR burst associations are rare. FRBs may be highly relativistic and geometrically beamed, or FRB-like events associated with SGR bursts may have narrow spectra and characteristic frequencies outside the observed band. It is also possible that the physical conditions required to achieve coherent radiation in SGR bursts are difficult to satisfy, and that only under extreme conditions could an FRB be associated with an SGR burst.   Non-Data-Aided Cycle Slip Self-Correcting Carrier Phase Estimation for QPSK Modulation Format of Coherent Wireless Optical Communication System 期刊论文  OAI收割 Ieee Access, 2019, 卷号: 7, 页码: 110451-110462 作者:  Y.Wang;  Z.Y.Wu;  X.L.Li;  T.W.Geng;  S.Ma   |  收藏  |  浏览/下载：50/0  |  提交时间：2020/08/24 Coherent detection,cycle slip,free-space optical communication,phase,estimation,performance,algorithms,capacity,Computer Science,Engineering,Telecommunications   Design and engineering development of single-mode fiber coupling system for Laser Doppler Velocity Radar 会议论文  OAI收割 作者:  Wu KY;  Ping HZ;  Ming XW;  Rong S   |  收藏  |  浏览/下载：28/0  |  提交时间：2018/11/20 Single-mode fiber coupling  Coherent detection  Laser Doppler velocity radar  Optical design   Adaptive optics for the free-space coherent optical communications 期刊论文  OAI收割 OPTICS COMMUNICATIONS, 2016, 卷号: 361, 页码: 21-24 作者:  Liu, Chao;  Chen, Mo;  Chen, Shanqiu;  Xian, Hao 收藏  |  浏览/下载：25/0  |  提交时间：2016/06/27 Adaptive optics  Free-space optical communication  Coherent detection   Digital coherent detection research on Brillouin optical time domain reflectometry with simplex pulse codes 期刊论文  OAI收割 chin. phys. b, 2014, 卷号: 23, 期号: 11, 页码: 110703 作者:  Hao Yun-Qi;  Ye Qing;  Pan Zheng-Qing;  Cai Hai-Wen;  Qu Rong-Hui 收藏  |  浏览/下载：19/0  |  提交时间：2016/11/28 Brillouin optical time domain reflectometry  digital coherent detection  simplex pulse codes  signal-to-noise ratio   Digital coherent detection research on Brillouin optical time domain reflectometry with simplex pulse codes 期刊论文  OAI收割 chin. phys. b, 2014, 卷号: 23, 期号: 11, 页码: 110703 作者:  Hao Yun-Qi;  Ye Qing;  Pan Zheng-Qing;  Cai Hai-Wen;  Qu Rong-Hui 收藏  |  浏览/下载：26/0  |  提交时间：2016/11/28 Brillouin optical time domain reflectometry  digital coherent detection  simplex pulse codes  signal-to-noise ratio   Detection of Brillouin scattering temperature signal in Brillouin optical time-domain reflectometer sensing system based on instantaneous frequency measurement technology 期刊论文  OAI收割 opt. eng., 2007, 卷号: 46, 期号: 12, 页码: 124401 孙安; 陈柏; 陈嘉琳; Li Guoyang; Wang Li; Chang Liping; 林尊琪 收藏  |  浏览/下载：1190/217  |  提交时间：2009/09/18 optical fiber sensors  Brillouin scattering  temperature measurement  optical coherent detection  instantaneous frequency measurement   自由空间相干光通信技术及发展 期刊论文  OAI收割 激光与光电子学进展, 2007, 卷号: 44, 期号: 8, 页码: 44, 51 许楠; 刘立人; 刘德安; 孙建锋; 栾竹 收藏  |  浏览/下载：1176/195  |  提交时间：2009/09/18 空间光通信  链路性能  相干探测  通信终端  space optical communications  link capacity  coherent detection  communication terminals   基于高频微波技术的分布式光纤传感器布里渊散射信号检测 期刊论文  OAI收割 中国激光, 2007, 卷号: 34, 期号: 4, 页码: 503, 506 孙安; 陈嘉琳; 李国扬; 王利; 常丽萍; 林尊琪 收藏  |  浏览/下载：1136/214  |  提交时间：2009/09/18 测量与计量  measurement and metrology  光纤传感器  optical fiber sensors  布里渊散射  Brillouin scattering  电光调制  electro-optical modulation  相干检测  optical coherent detection