Open AccessMeasurement of the effective nonlinear and dispersion coefficients in optical fibers by the induced grating autocorrelation technique
Author(s) -
Robinson Kuis,
Anthony Johnson,
Sudhir Trivedi
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.001755
Subject(s) - optics , materials science , photorefractive effect , grating , dispersion (optics) , photonic crystal fiber , sapphire , self phase modulation , autocorrelation , nonlinear optics , optical fiber , laser , optoelectronics , physics , statistics , mathematics
The induced grating autocorrelation technique, a technique based on temporally resolved two-beam coupling in a photorefractive crystal, was used to measure the nonlinear coefficient γ of three photonic crystal fibers (PCFs): a 30-cm long highly nonlinear PCF, and two large mode area PCFs of 4.5-m and 4.9-m lengths. The measurement used intense 2-ps, 800-nm (850-nm in one case) pulses from a Ti: sapphire laser that experienced self-phase modulation and group velocity dispersion as it travels inside the fibers. This technique was also expanded to measure γ and the dispersion coefficient β2 simultaneously.