Open AccessUltra-broadband optical parametric amplification based on pre-chirp controlling
Author(s) -
Song Xiao-Zhong,
Hongjun Liu,
Yishan Wang,
Wei Zhao
Publication year - 2008
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.57.271
Subject(s) - chirp , optics , bandwidth (computing) , broadband , optical parametric amplifier , physics , materials science , supercontinuum , optical fiber , photonic crystal fiber , laser , computer science , optical amplifier , telecommunications
For optical parametric amplification with broadband pump coming from the second harmonic of an amplified Ti:sapphire laser syetem, a novel ultra-broad bandwidth phase-matching approach is investigated. The results show that an approximately 400nm phase-matching bandwidth can be obtained by using a 10nm pump bandwidth. Moreover, the phase-matching bandwidth can reach 600nm when the pump bandwidth attains 20nm. In order to obtain temporal overlap of phase-matched spectral components, a linear chirp in the pump requires a quadratic chirp in signal. The photonic crystal fiber with a zero-dispersion wavelength of 800nm generates a supercontinuum with a quadratic chirp. The broadband pump pulse is stretched to a linear chirped pulse by a prism pairs. Calculations concerning the appropriate length of fiber and prism sequence to be inserted in optical path for the pre-chirp controlling were performed, the results of which provide a theoretical basis for implementing the ultra-broadband optical parametric amplification.