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Q: Quantenoptik

Q 10: Poster: Nonlinear Optics

Q 10.15: Poster

Dienstag, 3. April 2001, 12:30–15:00, AT2

Two-wave coupling at 940 nm using Rh:BaTiO₃ for diode laser beam amplification — •E. Gubbini, A. Hermerschmidt, and H.J. Eichler — Optisches Institut P1-1, Technische Universität Berlin, Straße des 17 Juni 135, 10623 Berlin

A single mode diode laser is amplified by a semiconductor tapered amplifier at the wavelength of 940 nm and then splitted in two beams. One is incident upon a photorefractive crystal Rh:BaTiO₃. Its power after the crystal is 130 mW. The other beam is injected into another semiconductor tapered amplifier to produce an amplified beam with a power of 266 mW which is used as the pump beam inside the crystal. Because of the energy transfer due to the photorefractive effect, the power of the output beam is increased from 130 mW to 250 mW. This means that about 45% of the pump beam power is transferred to the output beam. The obtained result shows that it is possible to observe two-wave mixing with high power output beams amplifier at 940 nm. We expect that, using additional amplified beams, it is possible to increase significantly the initial single mode output power maintaining the same beam quality.