Open AccessGeneral second-harmonic pulse shaping in grating-engineered quasi-phase-matched nonlinear crystals
Author(s) -
У. К. Сапаев,
Derryck T. Reid
Publication year - 2005
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.003264
Subject(s) - optics , grating , chirp , femtosecond , amplitude , phase (matter) , second harmonic generation , femtosecond pulse shaping , physics , pulse shaping , high harmonic generation , waveform , materials science , laser , quantum mechanics , voltage
We describe a spectrogram-based simulated annealing algorithm for designing quasi-phase-matched crystals capable of producing second harmonic generation pulses of any chosen amplitude and phase profile. The approach applies a new and rapid analytic method for calculating the amplitude and phase of the second harmonic generation pulses generated by a quasi-phase-matched crystal containing an arbitrary grating design. The performance of the algorithm is illustrated by examples of femtosecond second harmonic pulses designed according to various target shapes including single, double and triple Gaussian pulses, positive and negative linear chirp and square, triangular and stepped profiles.