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> 6 MW peak power at 532 nm from passively Q-switched Nd:YAG/Cr4+:YAG microchip laser

Institute for Molecular Science, Laser Research Center, 38 Nishigonaka, Myodaiji, Okazaki 444-8585, Japan.
Optics Express (Impact Factor: 3.53). 09/2011; 19(20):19135-41. DOI: 10.1364/OE.19.019135
Source: PubMed

ABSTRACT Megawatt peak power, giant pulse microchip lasers are attractive for wavelength conversion, provided their output is linearly polarized. We use a [110] cut Cr(4+):YAG for passively Q-switched Nd:YAG microchip laser to obtain a stable, linearly polarized output. Further, we optimize the conditions for second harmonic generation at 532 nm wavelength to achieve > 6 MW peak power, 1.7 mJ, 265 ps, 100 Hz pulses with a conversion efficiency of 85%.

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    • "The laser pulse features, suitable for ignition, were achieved by shortening the resonator length, and by maximizing the laser pulse energy following optimization of the pump conditions through right choice of the Nd:YAG parameters and of the Cr 4 þ :YAG SA crystal initial transmission [7]. Furthermore, such a scheme was employed for efficient generation of laser radiation into visible and ultraviolet spectra by single-pass nonlinear conversion of the fundamental wavelength [8] [9] [10]. An Yb:YAG-Cr 4 þ : YAG laser was developed recently by the same research group [11]. "
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