Open AccessLow noise optical multi-carrier generation using optical-FIR filter for ASE noise suppression in re-circulating frequency shifter loop
Author(s) -
Jintong Lin,
Lixia Xi,
Jianrui Li,
Xiaoguang Zhang,
Shahab Ahmad Niazi
Publication year - 2014
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.22.007852
Subject(s) - optics , carrier to noise ratio , noise floor , physics , noise (video) , amplified spontaneous emission , impulse noise , noise spectral density , noise figure , noise temperature , phase noise , materials science , noise measurement , signal to noise ratio (imaging) , noise reduction , acoustics , optoelectronics , computer science , laser , amplifier , pixel , cmos , artificial intelligence , image (mathematics)
In this paper, an improved multi-carrier generation scheme based on single-side-band recirculating frequency shifter with optical finite impulse response (FIR) filter for amplified spontaneous emission (ASE) noise suppression is proposed and experimentally demonstrated. The carrier-to-noise-ratio (CNR) instead of tone-to-noise-ratio (TNR) is introduced to more reasonably and exactly evaluate the signal-to-noise-ratio of a multi-carrier source with non-flat noise floor. We have experimentally attain the worst case CNR of 22.5dB and 19.1dB for generated 50 and 69 flat low noise carriers, which has shown significant improvement than the previous cited works based on recirculating frequency shifter.