Results 1 to 10 of about 307,428 (330)

Coherent demodulation using silicon-nitride integrated photonics for visible and short near-infrared optical communications

APL Photonics
Photonic integrated circuits (PICs) are gaining significant attention in the visible and short near-infrared spectral regions for diverse applications such as spectroscopy, optical atomic clocks, quantum optics, and optical communications.
Shota Ishimura, Abdulaziz E. Elfiqi, Takashi Kan, Hidenori Takahashi, Takehiro Tsuritani   +4 more
doaj   +1 more source

Investigation of a novel structure for 6PolSK-QPSK modulation

EURASIP Journal on Wireless Communications and Networking, 2017
Benefiting from the high spectrum efficiency and power efficiency, 6PolSK-QPSK (6-ary polarization-shift keying quadrature phase-shift keying) is a promising modulation format in coherent optical communication.
Yupeng Li, Ming Li, Jiawei Han, Tingting Han   +3 more
doaj   +1 more source

Quantum-limited measurements of optical signals from a geostationary satellite

, 2017
The measurement of quantum signals that traveled through long distances is of fundamental and technological interest. We present quantum-limited coherent measurements of optical signals, sent from a satellite in geostationary Earth orbit to an optical ...
Bayraktar, Ömer, Elser, Dominique, Greulich, Peter, Günthner, Kevin, Gütlich, Björn, Heine, Frank, Khan, Imran, Leuchs, Gerd, Marquardt, Christoph, Müller, Christian R., Philipp-May, Sabine, Saucke, Karen, Seel, Stefan, Stiller, Birgit, Tröndle, Daniel, Zech, Herwig   +15 more
core   +1 more source

Rate Analysis of Intensity Modulated Broadcast Optical Mobile Communication System With User Mobility

IEEE Photonics Journal, 2020
Optical mobile communication (OMC) provides a hopeful vision to handle with wireless communication scenarios where multiple mobile users are involved.
Jiajun Gao, Jian Dang, Zaichen Zhang, Liang Wu   +3 more
doaj   +1 more source

Recent Progress in Simplified Coherent Technology

Guangtongxin yanjiu
With the increasingly widespread application of optical communication technology in modern social production and life, the application scenarios of optical communication technology are becoming increasingly diverse and challenging.
HU Shan, LI Wei, PAN Yingmei, ZENG Tao, LUO Ming, YU Huang, GUO Hao   +6 more
doaj  

Method for compensating the constant component of noise in the reflectogram of a fiber-optic communication line under conditions of insufficient dynamic range of an optical backscatter reflectometer in the time domain

Научно-технический вестник информационных технологий, механики и оптики
A method for compensating for the constant noise component of reflectograms for a coherent optical backscatter reflectometer in the time domain is proposed. The presented solution ensures correct visualization of reflectograms, improves their readability
A. A. Sandrovskii, I. A. Sharkov, M. Yu. Plotnikov, S. A. Ushanov, D. B. Goncharov, E. E. Karpov   +5 more
doaj   +1 more source

Sparse Orthogonal Circulant Transform Multiplexing for Coherent Optical Fiber Communication

IEEE Photonics Journal, 2018
This paper introduces a new multicarrier system, named sparse orthogonal circulant transform multiplexing (S-OCTM), for optical fiber communication. This technique uses an inverse sparse orthogonal circulant transform (S-OCT) matrix, which is simple and ...
Yukui Yu, Wei Wang, Xing Ouyang, Zhenpeng Wang, Jian Zhao   +4 more
doaj   +1 more source

Highly efficient coherent optical memory based on electromagnetically induced transparency

, 2018
Quantum memory is an important component in the long-distance quantum communication system based on the quantum repeater protocol. To outperform the direct transmission of photons with quantum repeaters, it is crucial to develop quantum memories with ...
Chen, Hung-Shiue, Chen, Yi-Hsin, Chen, Ying-Cheng, Chen, Yong-Fan, Hsiao, Ya-Fen, Hung, Chih-Chiao, Lee, Chih-Hsi, Lin, Sheng-Xiang, Tsai, Pin-Ju, Yu, Ite A.   +9 more
core   +1 more source

Factors Affecting the Sensitivity of Coherent Detection

Guangtongxin yanjiu
【Objective】Coherent optical communication is a high-speed, high-quality, and highly secure communication method, and coherent detection plays an extremely important role in coherent optical communication.
HAN Meimiao, YANG Gengen, LIANG Jingyuan, KE Xizheng   +3 more
doaj  

Joint tracking and equalization scheme for multi-polarization effects in coherent optical communication systems.

Optics Express, 2016
We propose a joint multi-polarization-effect tracking and equalization method based on two extended Kalman filters, which can cope with state of polarization (SOP) tracing, polarization demultiplexing, equalization for polarization dependent loss (PDL ...
Yiqiao Feng, Linqian Li, Jiachuan Lin, Hengying Xu, Wenbo Zhang, Xianfeng Tang, Lixia Xi, Xiaoguang Zhang   +7 more
semanticscholar   +1 more source