Dynamics of Cherenkov radiation trapped by a soliton in photonic-crystal fibers.
The trapping of Cherenkov radiation by Raman solitons is an important process during supercontinuum generation and has been demonstrated as an effective way to extend the Cherenkov-radiation-based wavelength conversion toward the visible band. In this Letter we demonstrate that the existence of the self-steepening effect increases the energy of the Cherenkov radiation during the trap while reducing its frequency blueshift. The frequency and energy evolutions of Cherenkov radiation are analytically studied, and the predictions are consistent with the simulations based on the generalized nonlinear Schrödinger equation.
Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications (BUPT), Ministry of Education, P.O. Box 55, Beijing 100876, China. hongyaoliu@gmail.com
Hongyao
H
Liu
Yitang
Y
Dai
Cong
C
Xu
Jian
J
Wu
Kun
K
Xu
Yan
Y
Li
Xiaobin
X
Hong
Jintong
J
Lin