Results 281 to 290 of about 20,155 (297)

Investigation into constant envelope orthogonal frequency division multiplexing for polarization-division multiplexing coherent optical communication

Optical Engineering, 2017
Benefiting from the high spectral efficiency and low peak-to-average power ratio, constant envelope orthogonal frequency division multiplexing (OFDM) is a promising technique in coherent optical communication. Polarization-division multiplexing (PDM) has been employed as an effective way to double the transmission capacity in the commercial 100  Gb/s ...
Ding Ding, Yupeng Li
openaire   +1 more source

Visible light communications: increasing data rates with polarization division multiplexing

Optics Letters, 2020
In this Letter, we propose a new configuration for visible light communication systems, which results in doubling of the data rate due to the use of polarization division multiplexing. As light-emitting diodes are unpolarized incoherent light sources, we isolate both the perpendicular s and parallel p modes for
Petr Chvojka, Andrew Burton, Petr Pesek, Xicong Li, Zabih Ghassemlooy, Stanislav Zvanovec, Paul Anthony Haigh   +6 more
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An experiment of de-multiplexing for polarization division multiplexing system by PSO algorithm

SPIE Proceedings, 2010
We report an experiment of de-multiplexing automatically in a polarization division multiplexing system using a DSP based de-multiplexer. The searching algorithm was a modified Particle Swarm Optimization. We successfully demonstrated the de-multiplexing scheme both in a 20-Gb/s PolMux-NRZ-OOK system and a 40-Gb/s PolMux-RZ-DQPSK system.
Qingyue Di, Xuan Weng, Yang Sun, Feng Tian, Lixia Xi, Xiaohong Zhao, Xiaoguang Zhang   +6 more
openaire   +1 more source

Crosstalk detection schemes for polarization division multiplex transmission

Journal of Lightwave Technology, 2001
Polarization division multiplex (PolDM) is a bandwidth-efficient and sensitive modulation format suitable for upgrading bandwidth-limited trunk lines. We show how control signals for polarization demultiplex can be obtained efficiently. For interleaved return-to-zero (RZ) signals, incoherent crosstalk has to be detected and minimized.
R. Noe, S. Hinz, D. Sandel, F. Wust
openaire   +1 more source

Polarization-division multiplexing based multi-function lidar system

2018 23rd Opto-Electronics and Communications Conference (OECC), 2018
We demonstrate a flexible multi-function lidar system based on polarization-division multiplexing (PDM), in which simultaneous ranging and velocimetry are achieved. With slight modifications, the lidar system can also be used for other functions.
Kai Chen, Hongxiang Zhang, Zhongyang Xu, Shilong Pan   +3 more
openaire   +1 more source

Robust Carrier Recovery in Polarization Division Multiplexed Receivers

Optical Fiber Communication Conference, 2012
We present a novel carrier recovery which can track fast and large sinusoidal frequency oscillations of commercially available lasers and efficiently compensate for laser noise. Q gain of 0.8 dB is recorded in offline experiments.
Nebojsa Stojanovic, Yu Zhao, Bangning Mao, Changsong Xie, Fabian N. Hauske, Ming Chen   +5 more
openaire   +1 more source

Optical polarization division multiplexing at 4 Gb/s

IEEE Photonics Technology Letters, 1992
An optical polarization multiplexing system using BPSK coherent heterodyne detection to transmit 4 Gb/s over a 45-km standard single-mode fiber optical link at a receiver sensitivity of -35 dBm is described. The 4-Gb/s system has a potential receiver sensitivity of -40 dBm while using 2-Gb/s baseband electronics. >
P.M. Hill, R. Olshansky, W.K. Burns
openaire   +1 more source

Multifunction Lidar System Based on Polarization-Division Multiplexing

Journal of Lightwave Technology, 2019
A multifunction lidar system is proposed based on polarization-division multiplexing, by which the distance, velocity, and depolarization ratio of a target can be simultaneously measured. The key component of the lidar system is a polarization-division multiplexing dual-drive Mach-Zehnder modulator (PDM-DMZM).
Zhongyang Xu, Kai Chen, Hongxiang Zhang, Shilong Pan   +3 more
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Nonlinear Frequency Division Multiplexing: from Single Polarization to Dual Polarization

2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019
In this paper, we review the recent progress of Nonlinear Frequency Division Multiplexing (NFDM) transmission research. In addition, we also highlight the challenges of NFDM transmissions in practical implementation conditions and provide the future outlook.
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Polarization Division Multiplexing for Optical Data Communications

2019
Multiple parallel channels are ubiquitous in optical communications, with spatial division multiplexing (separate physical paths) and wavelength division multiplexing (separate optical wavelengths) being the most common forms. In this research work, we investigate the viability of polarization division multiplexing, the separation of distinct parallel ...
openaire   +2 more sources