21 October 2004 Nd:YAG microchip laser frequency doubling with periodically poled and conventional type II KTP crystals
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Proceedings Volume 5581, ROMOPTO 2003: Seventh Conference on Optics; (2004) https://doi.org/10.1117/12.582792
Event: ROMOPTO 2003: Seventh Conference on Optics, 2003, Constanta, Romania
Abstract
Fundamental 1064 nm wavelength radiation of a diode pumped passively Q-switched Nd:YAG microchip laser was frequency doubled by periodically poled (PP) and conventional type II KTP crystals. Second harmonic (SH) conversion efficiency of 60% and 47% has been achieved with PPKTP and KTP crystals, respectively. SH pulse energy of as much as 6 μJ, at 900 Hz repetition rate, has been obtained for 10 μJ pulse energy of the input 1064 nm radiation focused with a waist radius of 25 μm inside the 8 mm long PPKTP crystal. We estimated an effective nonlinear coefficient of 6.9 pm/V and a thermal acceptance FHWM bandwidth of 5.78°C for the PPKTP sample.
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Razvan V. Dabu, Razvan V. Dabu, Aurel Stratan, Aurel Stratan, Constantin G. Fenic, Constantin G. Fenic, Constantin Ungureanu, Constantin Ungureanu, Liviu P. Neagu, Liviu P. Neagu, Laurentiu Rusen, Laurentiu Rusen, } "Nd:YAG microchip laser frequency doubling with periodically poled and conventional type II KTP crystals", Proc. SPIE 5581, ROMOPTO 2003: Seventh Conference on Optics, (21 October 2004); doi: 10.1117/12.582792; https://doi.org/10.1117/12.582792
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