Ra. Ganeev et T. Usmanov, INFLUENCE OF THE GROUP-VELOCITY MISMATCH AT COMPRESSION AND FREQUENCY-CONVERSION OF PICOSECOND PULSES, Kvantovaa elektronika, 23(10), 1996, pp. 899-901
The efficiency of second-harmonic generation and the degree of compres
sion of picosecond pulses from a neodymium glass laser were enhanced b
y a delay between ordinary and extraordinary pulses interacting in KDP
crystals. The conversion efficiency was increased by a factor of 1.5
(from 33 to 50 %) and the second-harmonic pulses were compressed by a
factor of 2.4 (from 4.8 to 2 ps).