Title :
Cancellation of B-integral accumulation for CPA lasers
Author :
Konoplev, O.A. ; Meyerhofter, D.D.
Author_Institution :
Dept. of Mech. Eng., Rochester Univ., NY, USA
Abstract :
The B-integral accumulated in a chirped-pulse-amplification (CPA) laser can be canceled using a semiconductor with a negative nonlinear index of refraction. We demonstrate this experimentally using GaAs at 1.053 μm. The compressed-pulse duration was broadened due to self-phase modulation (SPM) of the chirped pulse. It was reduced to its unmodulated value with substantial wing reduction after passing through a semiconductor wafer before compression. Optimum semiconductor sample parameters for minimizing the B-integral such as gap energy, nonlinear and linear absorption, nonlinear refraction, and thickness for different pulse durations and intensities are discussed
Keywords :
chirp modulation; neodymium; nonlinear optics; optical modulation; optical pulse compression; phase modulation; refractive index; solid lasers; 1.053 mum; B-integral accumulation; CPA lasers; GaAs; LiYF4:Nd; YLF:Nd; chirped-pulse-amplification laser; compressed-pulse duration; gap energy; linear absorption; negative nonlinear index of refraction; nonlinear refraction; optimum semiconductor sample parameters; pulse durations; pulse intensities; self-phase modulation; semiconductor wafer; Chirp; Laser fusion; Laser theory; Mechanical engineering; Optical amplifiers; Optical materials; Optical pulses; Optical refraction; Pulse amplifiers; Pulse compression methods;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/2944.686756
