Diffraction-arrested soliton self-frequency shift of few-cycle laser pulses in a photonic-crystal fiber.
The balance between diffraction and index-step guiding in photonic-crystal fibers is controlled by modifying the fiber structure, leading to different wavelength dependences of the effective mode area and providing a mechanism to control nonlinear-optical phenomena. In optical fibers with a steep profile, the guided mode of the light field tends to become much less compact with an increase in radiation wavelength, slowing down the Raman-induced soliton self-frequency shift of an ultrashort laser pulse. A reduction of the soliton self-frequency shift is demonstrated for input laser pulses.
Serebryannikov
E E
EE
Physics Department, International Laser Center, M. V. Lomonosov Moscow State University, Vorob'evy gory, Moscow 119992, Russia.
Zheltikov
A M
AM
Köhler
S
S
Ishii
N
N
Teisset
C Y
CY
Fuji
T
T
Krausz
F
F
Baltuska
A
A