Open AccessAll‐optical frequency chirp magnification based on four‐wave‐mixing for optical comb generation
Author(s) -
Du Jiangbing,
Yan Fangfang
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2013.1376
Subject(s) - chirp , magnification , bandwidth (computing) , optics , chirp spread spectrum , four wave mixing , wavelength , mixing (physics) , materials science , signal (programming language) , nonlinear optics , optoelectronics , physics , telecommunications , computer science , laser , channel (broadcasting) , spread spectrum , quantum mechanics , direct sequence spread spectrum , programming language
An efficient optical comb generation method based on degenerated four‐wave‐mixing process in highly nonlinear fibre is demonstrated. The all‐optical processing of the frequency chirp is wavelength tunable and thus enables the capability of tunable chirp magnification. The magnification of the frequency chirp with a factor tunable from two to five has been demonstrated. An optical comb with 22 sub‐carriers has been obtained which refers to a bandwidth of 210 GHz, about five times the bandwidth of 40 GHz for the original signal.