Temporal analysis of pulsed phase conjugation in laser amplifiers: application to Nd:YVO{sub 4}

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · Journal of the Optical Society of America, Part B: Optical Physics

DOI:https://doi.org/10.1364/JOSAB.13.001748· OSTI ID:286567

Brignon, A ^[1]

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1. Laboratoire Central de Recherches, Thomson-CSF, F-91404 Orsay (France)

The theory of phase conjugation in laser amplifiers by saturable-gain degenerate four-wave mixing with copolarized beams is developed for pulses of arbitrary temporal shape and duration in the limit of a weak signal beam. The influence of the input pulse{close_quote}s characteristics (energy, temporal pulse shape, duration) on the phase-conjugate reflectivity and on the conjugate pulse shape is analyzed. A sharp instantaneous peak of phase-conjugate reflectivity is predicted at high intensities of the four-wave mixing beams. This effect is experimentally demonstrated at {lambda}{sub 0}=1064 nm in a Nd:YVO{sub 4} amplifier pumped by a cw Ti:sapphire laser. A transient peak reflectivity of {ital R}{approximately}50{percent} is thus obtained, corresponding to an enhancement of 1.6{times} compared with the maximum steady-state reflectivity. The experimental results and the theoretical predictions are in good agreement. {copyright} {ital 1996 Optical Society of America.}

• Sponsoring Organization: USDOE
• OSTI ID: 286567
• Journal Information: Journal of the Optical Society of America, Part B: Optical Physics, Journal Name: Journal of the Optical Society of America, Part B: Optical Physics Journal Issue: 8 Vol. 13; ISSN JOBPDE; ISSN 0740-3224
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
AMPLIFICATION
NEAR INFRARED RADIATION
NEODYMIUM LASERS
OPTICAL MIXING
PULSE TECHNIQUES
REFLECTIVITY