Open AccessTheoretical study on ultrafast response of semiconductor optical amplifier
Author(s) -
Jiang Zhong,
Chi Zhang,
Dexiu Huang
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.4713
Subject(s) - ultrashort pulse , picosecond , semiconductor , optics , dispersion (optics) , amplifier , time domain , materials science , optical amplifier , pulse (music) , optoelectronics , absorption (acoustics) , spectral width , physics , wavelength , laser , cmos , detector , computer science , computer vision
We proposed a novel method to analyze the propagation of sub-picosecond optical pulses through semiconductor optical amplifiers(SOA), fully considering spectral dispersion of ultrashort pulses. A reasonable model is established via sampling the pulses simultaneously in time domain and frequency domain. Based on the established model, we observed an evident shift of the pulse spectrum, which agrees well with the experiment results in literature. Further, the relationship is discussed respectively between the value of shift and several external conditions, including wavelength, energy, width of the pulse, length of SOA and injected current. Gain suppression induced by ultrafast nonlinearities including carrier heating, spectral hole burning and two-photon absorption is described in detail, employing two-beam configuration. The simulated results give good guidance to the improvement of ultrafast dynamic characteristics of SOAs.