Photosensitivity-enabled dispersion controllability for quasi-phase-matching in photonic crystal fibers.
A novel photonic crystal fiber featured by concentric cores is proposed to induce dispersion controllability by photosensitivity. Chromatic dispersion can be changed from -1827 to 72 ps/nm/km with refractive index modulation of 4 x 10(-4) produced in Ge-doped regions in the fiber. Effective mode area of inner mode is as small as 6.4 mum(2). The proposed fiber enables to achieve quasi-phase-matched nonlinear parametric interaction in a single piece of photonic crystal fiber, by periodically alternating dispersion and compensating for phase mismatching caused by the dispersion.
Zhang
Lin
L
Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA. linzhang@usc.edu
Luo
Ting
T
Yue
Yang
Y
Yu
Changyuan
C
Willner
Alan E
AE