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Berlin 2001 – scientific programme

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Q: Quantenoptik

Q 10: Poster: Nonlinear Optics

Q 10.2: Poster

Tuesday, April 3, 2001, 12:30–15:00, AT2

A new cw-OPO using PPLN and PPKTP — •U. Strößner1, A. Arie2, G. Rosenmann2, J.-P. Meyn3, R. Wallenstein3, J. Mlynek1, A. Peters1, and S. Schiller41Uni Konstanz — 2Tel Aviv University — 3Uni Kaiserslautern — 4Uni Düsseldorf

In recent years the development of cw-OPOs has made enormous progress, mainly enabled by the development on high power pump sources and novel nonlinear materials. While first infrared pumped OPOs are now commercially available, cw-OPOs pumped by visible lasers are still in the state of demonstration experiments.

To realize a practical cw light source with a broad emission range in the red and near infrared, we have implemented a new OPO setup. It is based on a bow-tie shaped ring cavity resonating the signal and pumped in single pass by a commercial single frequency laser (Coherent Verdi) at 532 nm. As nonlinear material we use large area PPKTP- as well as PPLN-multigrating crystals.

For the PPKTP-crystal emission was obtained from 669 to 2600 nm which is by far the broadest emission range ever reported for cw-OPOs. A minimum threshold of 290 mW, a maximum output power of 800 mW in the idler and up to 80 % pump depletion were observed. The device is expected to operate stably on a single frequency after introduction of an etalon into the cavity.

We also present results obtained with PPLN, give a direct comparison between the two materials and discuss new OPO concepts and approaches to further extend the spectral coverage.

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