Results 21 to 30 of about 387 (134)

ASE Noise in Raman Amplifiers: Pump Depletion Impact [PDF]

Radioengineering, 2018
This paper provides a detailed analysis for the effect of pump depletion on amplified spontaneous emission (ASE) noise power, optical signal to noise ratio (OSNR), and noise figure (NF) in forward pumped distributed Raman fiber amplifier (DRFA).
S. E. Darwish, A. S. Samra, M. H. Aly
doaj  

Impact of Out-of-Band Noise on OSNR Measurement Using Brillouin Optical Spectrum Analyzer and Its Mitigation Method

IEEE Photonics Journal, 2018
Brillouin optical spectrum analyzer (BOSA) based on stimulated Brillouin scattering (SBS) can provide ultra-high resolution, which in theory can greatly improve the optical signal-to-noise ratio (OSNR) measurement accuracy, especially for systems with ...
Yibo Zhong, Sheng Cui, Changjian Ke, Zhen Guo, Chen Xing, Haoyu Wang, Keyuan Yang, Deming Liu   +7 more
doaj   +1 more source

Demonstration of Programmable In-Band OSNR Monitoring Using LCFBG With Commercial Thermal Printer Head

IEEE Photonics Journal, 2015
We proposed and experimentally demonstrated a programmable optical signal-to-noise ratio (OSNR) monitoring scheme by using linearly chirped fiber Bragg grating (LCFBG) and a commercial thermal printer head.
Ruoxu Wang, Ming Tang, Liangjun Zhang, Hailiang Zhang, Zhenhua Feng, Rui Lin, Songnian Fu, Deming Liu, Perry Ping Shum   +8 more
doaj   +1 more source

Joint Fiber Nonlinear Noise Estimation, OSNR Estimation and Modulation Format Identification Based on Asynchronous Complex Histograms and Deep Learning for Digital Coherent Receivers

Sensors, 2021
In this paper, asynchronous complex histogram (ACH)-based multi-task artificial neural networks (MT-ANNs), are proposed to realize modulation format identification (MFI), optical signal-to-noise ratio (OSNR) estimation and fiber nonlinear (NL) noise ...
Shuailong Yang, Liu Yang, Fengguang Luo, Bin Li, Xiaobo Wang, Yuting Du, Deming Liu   +6 more
doaj   +1 more source

Demultiplexing-free ultra-compact WDM-compatible multimode optical switch assisted by mode exchanger. [PDF]

Nanophotonics
Abstract Silicon‐based optical switches are integral to on‐chip optical interconnects, and mode‐division multiplexing (MDM) technology has enabled modes to function as carriers in routing, further boosting optical switches’ link capacity. However, traditional multimode optical switches, which typically use Mach–Zehnder interferometer (MZI) structures ...
Liu S, Fu X, Niu J, Huo Y, Cheng C, Yang L.   +5 more
europepmc   +2 more sources

Optical Performance Monitoring Technology of IMDD System based on Deep Neural Network

Guangtongxin yanjiu, 2023
In advanced high-speed fiber optic communication systems, due to the introduction of dense wavelength division multiplexing technology, the signal spectral interval is getting narrower and narrower, and the traditional out-of-band Optical Signal-to-Noise
LIU Jun, LI Bo-zhong, CHENG Fang, LI Zi-fan, GUO Ying, SUN Yu-xiao, DENG Cun-xue, ZHANG Ru-yi, WANG Ying-xu   +8 more
doaj  

Simultaneous and Independent OSNR and Chromatic Dispersion Monitoring Using Empirical Moments of Asynchronously Sampled Signal Amplitudes

IEEE Photonics Journal, 2012
We analytically investigate and derive equations for the empirical moments of asynchronously sampled signal amplitudes as functions of signal power, noise power, and accumulated chromatic dispersion (CD) of a transmission link.
Faisal Nadeem Khan, Alan Pak Tao Lau, Trevor B. Anderson, Jonathan C. Li, Chao Lu, P. K. A. Wai   +5 more
doaj   +1 more source

A Density Clustering Algorithm for Simultaneous Modulation Format Identification and OSNR Estimation

Applied Sciences, 2020
In this work, we propose a combined method to implement both modulation format identification (MFI) and optical signal-to-noise ratio (OSNR) estimation, a method based on density-based spatial clustering of applications with a noise (DBSCAN) algorithm ...
Zhao Zhao, Aiying Yang, Peng Guo, Qingzhao Tan   +3 more
doaj   +1 more source

QPSK Signal Regeneration Based on Vector Phase Sensitive Amplification With Low Pump Powers

IEEE Access, 2019
In this paper, an all-optical quadrature phase shift keying (QPSK) phase regeneration scheme using vector phase sensitive amplification (PSA) is proposed, analyzed, and simulated. Compared with the conventional scalar PSA scheme, the vector superposition
Zhen Xing, Hongxiang Wang, Yuefeng Ji
doaj   +1 more source

Toward Practical Temporal Diversity Coherent Combining Based Variable Data-Rate Free Space Optical Communication Systems

IEEE Access, 2022
Free-space optical communication (FSOC) systems with variable data-rates can support different missions with different transmission distances and ensure reliable transmission in periods of unfavorable weather conditions.
Faming Li, Sheng Cui, Yanan Chen, Chenjie Rao, Yicong Tu, Keji Zhou, Deming Liu   +6 more
doaj   +1 more source