Nd:YAG microchip laser frequency doubling with periodically poled and conventional type II KTP crystals

Razvan V. Dabu; Aurel Stratan; Constantin G. Fenic; Constantin Ungureanu; Liviu P. Neagu; Laurentiu Rusen

doi:10.1117/12.582792

21 October 2004 Nd:YAG microchip laser frequency doubling with periodically poled and conventional type II KTP crystals

Razvan V. Dabu, Aurel Stratan, Constantin G. Fenic, Constantin Ungureanu, Liviu P. Neagu, Laurentiu Rusen

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.

Citation Download Citation

Razvan V. Dabu, Aurel Stratan, Constantin G. Fenic, Constantin Ungureanu, Liviu P. Neagu, and 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); https://doi.org/10.1117/12.582792

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