Multipass degenerate four-wave mixing in a diode-pumped Nd:YVO{sub 4} saturable amplifier

Journal Article · Sat Jul 01 04:00:00 EDT 1995 · Journal of the Optical Society of America, Part B: Optical Physics

DOI:https://doi.org/10.1364/JOSAB.12.001316· OSTI ID:165465

Brignon, A; Feugnet, G; Huignard, J; Pocholle, J ^[1]

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

The process of saturable-gain four-wave mixing (DFWM) in a diode-pumped Nd:YVO{sub 4} amplifier with interacting beams provided by a Nd:YAG oscillator is investigated. Multipass geometries are employed that arrange for the signal beam to experience an increased interaction length relative to that of the pump beams. DFWM reflectivities up to {ital R}=170% and a diffraction efficiency {eta}=6% of the volume population hologram written in the Nd:YVO{sub 4} amplifier are obtained experimentally. A theoretical analysis of multipass DFWM is presented in the transient (pulsed) regime, including the laser amplification and the mutual interaction of all the interacting beams as well as the spectral mismatch between the beam frequency and the gain line-center frequency of the Nd:YVO{sub 4} amplifier. It is shown that because of the close spectral matchup of the Nd:YAG oscillator and the Nd:YVO{sub 4} amplifier, the amplitude (gain) grating contribution is predominant compared with that of the phase grating. {copyright} 1995 Optical Society of America

• Sponsoring Organization: USDOE
• OSTI ID: 165465
• 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: 7 Vol. 12; ISSN JOBPDE; ISSN 0740-3224
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
AMPLIFICATION
EFFICIENCY
FREQUENCY MIXING
GAIN
INFRARED RADIATION
NEODYMIUM LASERS
POWER RANGE 100-1000 W
REFLECTIVITY