Title :
Pulse temporal and spatial chirping by a bulk Kerr medium in a regenerative amplifier
Author :
Yan, Li ; Liu, Yuan-Qun ; Lee, Chi H.
Author_Institution :
Dept. of Electr. Eng., Maryland Univ., Baltimore, MD, USA
fDate :
9/1/1994 12:00:00 AM
Abstract :
The temporal and spatial chirping of a pulse by a bulk Kerr medium in a regenerative amplifier is analyzed. Utilizing the waveguide nature of an optical resonator, temporal self-phase modulation can cumulate through multiple passes as large as ~40 rad, while the nonlinear phase shift associated with spatial chirping is confined to ~1.5 rad, thus reducing the degree of spatial chirping to less than 4 percent. We show that the Guoy phase shift reduces the magnitude of self-phase modulation. Experimental results of pulse chirping in a neodymium:phosphate glass regenerative amplifier agree with the theoretical calculations. Direct compression of highly chirped, amplified pulses by a pair of gratings produces 10 μJ, 300 fs pulses at a 500 Hz repetition rate
Keywords :
optical Kerr effect; optical modulation; optical resonators; 10 muJ; 300 fs; 500 Hz; Guoy phase shift; bulk Kerr medium; gratings; neodymium:phosphate glass; nonlinear phase shift; optical resonator; pulse compression; regenerative amplifier; spatial chirping; temporal chirping; temporal self-phase modulation; waveguide; Chirp modulation; Glass; Gratings; Optical amplifiers; Optical pulses; Optical resonators; Optical waveguides; Phase modulation; Pulse amplifiers; Pulse compression methods;
Journal_Title :
Quantum Electronics, IEEE Journal of
