Open AccessSidemode suppression for coupled optoelectronic oscillator by optical pulse power feedforward
Author(s) -
Yitang Dai,
Ruixin Wang,
Feifei Yin,
Jian Dai,
Yu Li,
Jianqiang Li,
Kun Xu
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.027589
Subject(s) - optics , feed forward , materials science , fiber laser , noise (video) , optical fiber , phase noise , power (physics) , pulse (music) , optoelectronics , physics , quantum mechanics , control engineering , artificial intelligence , detector , computer science , engineering , image (mathematics)
Multiple sidemodes have been observed in a coupled optoelectronic oscillator (COEO) when the contained actively mode-locked fiber ring laser employs erbium-doped fiber (EDF). We propose that such sidemodes can be suppressed significantly by an optical pulse power feedforward scheme, through which the mode-locked optical pulse is reversely intensity-modulated by itself, resulting in a fast power limiting. Experimentally we show that sidemodes are suppressed as much as 40 dB in a 10-GHz COEO. The additional noise induced by the power feedforward technique is analyzed numerically. We show that for a COEO with a typical cavity length, the feedforward contribution to final single-side band (SSB) noise is minor and neglectable.