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Proceedings Paper

Tandem PPKTP and ZGP OPO for mid-infrared generation
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Paper Abstract

Efficient laser sources in the 3 - 5 μm wavelength range are needed for directed infrared countermeasures, but also have applications in remote-sensing, medicine and spectroscopy. We present new results on our tandem optical parametric oscillator (OPO) scheme for converting the radiation from a 1.06 μm Nd3+-laser to the mid-infrared. Multi Watt level output power in the 3-5 μm range at 20 kHz pulse repetition frequency is reported. Our setup uses a type I quasi phase-matched PPKTP crystal in a near degenerate OPO to generate 2.13 μm radiation. A volume Bragg grating resonant close to, but not exactly at the degenerate wavelength, is used as a cavity mirror to reduce the bandwidth and ensure singly resonant operation. Both signal and idler from the PPKTP OPO are used to pump a ZGP OPO generating high power radiation in the 3-5 μm region. Using this scheme for each pump photon it is possible to generate four photons for each pump photon, all in the interesting wavelength range, thus enabling high efficiency conversion.

Paper Details

Date Published: 2 October 2008
PDF: 10 pages
Proc. SPIE 7115, Technologies for Optical Countermeasures V, 71150O (2 October 2008); doi: 10.1117/12.799148
Show Author Affiliations
Markus Henriksson, Swedish Defence Research Agency (Sweden)
Royal Institute of Technology (Sweden)
Lars Sjöqvist, Swedish Defence Research Agency (Sweden)
Gustav Strömqvist, Royal Institute of Technology (Sweden)
Valdas Pasiskevicius, Royal Institute of Technology (Sweden)
Fredrik Laurell, Royal Institute of Technology (Sweden)

Published in SPIE Proceedings Vol. 7115:
Technologies for Optical Countermeasures V
David H. Titterton; Mark A. Richardson, Editor(s)

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