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.
© 2010 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: October 7, 2010
Revised Manuscript: November 5, 2010
Manuscript Accepted: November 5, 2010
Published: November 29, 2010
Hongyao Liu, Yitang Dai, Cong Xu, Jian Wu, Kun Xu, Yan Li, Xiaobin Hong, and Jintong Lin, "Dynamics of Cherenkov radiation trapped by a soliton in photonic-crystal fibers," Opt. Lett. 35, 4042-4044 (2010)