Abstract

The near-and far-end source spectra in optical full duplex systems can heterodyne, producing a high level of beat interference noise in the receiver bandwidth. This is called coherent common-channel crosstalk, the penalty from which is found in addition to that from incoherent near-end crosstalk (NEXT) quantified in an earlier publication. We find most directly modulated high-chirp laser systems, such as those using single-mode distributed feedback lasers or multimode Fabry-Perot (FP) lasers, are relatively immune to coherent NEXT for speeds up to 100 Mb/s. In the transform limit, however, which occurs at high bit rates or low chirp, the maximum allowable NEXT must be decreased by as much as 20 dB, compared to the incoherent case. One solution is to use uncooled single-mode lasers separated by a small wavelength spacing (20 nm, for example) as popularized for the coarse wavelength division multiplexing (WDM) grid.

© 2002 IEEE

Theoretical and experimental investigation of direct detection optical OFDM transmission using beat interference cancellation receiver

S. Alireza Nezamalhosseini, Lawrence R. Chen, Qunbi Zhuge, Mahdi Malekiha, Farokh Marvasti, and David V. Plant
Opt. Express 21(13) 15237-15246 (2013)

Full duplex transmission link over single-strand optical fiber

B. S. Kawasaki, K. O. Hill, D. C. Johnson, and A. U. Tenne-Sens
Opt. Lett. 1(3) 107-108 (1977)

Real-time adaptive optical self-interference cancellation for in-band full-duplex transmission using SARSA(λ) reinforcement learning

Xiao Yu, Jia Ye, Lianshan Yan, Tao Zhou, Peng Li, Xihua Zou, Wei Pan, and Jianping Yao
Opt. Express 31(8) 13140-13153 (2023)

Half-duplex optical transmission link using an LED source–detector scheme

T. Ozeki, T. Uematsu, T. Ito, M. Yamamoto, and Y. Unno
Opt. Lett. 2(4) 103-105 (1978)

Symmetrical Full-Duplex Integrated Passive Optical Network and Optical Wireless Communication Transmission System

Yuanquan Wang, Jianjun Yu, and Nan Chi
J. Opt. Commun. Netw. 7(7) 628-633 (2015)