Open AccessExperimental demonstration of twin-single-sideband signal detection system based on a single photodetector and without optical bandpass filter
Author(s) -
Chongxiu Yu,
Xia Sheng,
Ran Gao,
Fu Wang,
zhipei li,
Huan Chang,
Lulu Huang,
Qi Zhang,
Xiangjun Xin,
Xin Huang,
Jinghao Yan,
Ling Jiang,
Saihua Cui,
Leyi Kong,
Julian Cheng
Publication year - 2022
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.471639
Subject(s) - sideband , optics , compatible sideband transmission , band pass filter , physics , phase shift keying , amplitude modulation , quadrature amplitude modulation , optical filter , bit error rate , telecommunications , computer science , bandwidth (computing) , frequency modulation , radio frequency , channel (broadcasting)
A twin-single-sideband (twin-SSB) signal single-photodiode (PD) detection system without optical bandpass filter is experimentally demonstrated for the first time. After direct detection by a single-ended PD at the receiver side, we can directly separate the optical left sideband (LSB) and right sideband (RSB) using a simple one-path digital signal processing algorithm without separating the two sideband signals using an optical bandpass filter (OBPF), thus achieving lower complexity and low cost while doubling the spectral efficiency. Using our proposed twin-SSB scheme, we demonstrate 1-, 2-, and 4-Gbaud LSB geometric shaping 4-quadrature amplitude modulation and RSB quadrature phase shift keying signal transmission over 10 km of single-mode fiber (SMF). Our experimental results demonstrate that the bit-error rate (BER) of the 4-Gbaud LSB geometric shaping 4-quadrature amplitude modulation (GS-4QAM) and RSB quadrature phase shift keying (QPSK) transmission system is below the 7% hard decision forward error correction threshold.