Complete chirp analysis of a gain-switched pulse using an interferometric two-photon absorption autocorrelation.
We propose a simple but powerful scheme for the complete analysis of the frequency chirp of a gain-switched optical pulse using a fringe-resolved interferometric two-photon absorption autocorrelator. A frequency chirp imposed on the gain-switched pulse from a laser diode was retrieved from both the intensity autocorrelation trace and the envelope of the second-harmonic interference fringe pattern. To verify the accuracy of the proposed phase retrieval method, we have performed an optical pulse compression experiment by using dispersion-compensating fibers with different lengths. We have obtained close agreement by less than a 1% error between the compressed pulse widths and numerically calculated pulse widths.
Chin
Sang Hoon
SH
Department of Information and Communications, Gwanju Institute of Science and Technology, Gwangju, South Korea.
Kim
Young Jae
YJ
Song
Ho Seong
HS
Kim
Dug Young
DY