Pulse temporal and spatial chirping by a bulk Kerr medium in a regenerative amplifier

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 /spl sim/40 rad, while the nonlinear phase shift associa...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 1994-09, Vol.30 (9), p.2194-2202
Main Authors: Li Yan, Yuan-Qun Liu, Lee, C.H.
Format: Article
Language:English
Subjects:
Chirp modulation
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Glass
Gratings
Nonlinear optics
Optical amplifiers
Optical pulses
Optical resonators
Optical waveguides
Optics
Phase modulation
Physics
Pulse amplifiers
Pulse compression methods
Ultrafast processes
optical pulse generation and pulse compression
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Summary: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 /spl sim/40 rad, while the nonlinear phase shift associated with spatial chirping is confined to /spl sim/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 /spl mu/J, 300 fs pulses at a 500 Hz repetition rate.< >
ISSN:0018-9197
1558-1713
DOI:10.1109/3.309883