Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 26: Laser Development: Solid State Lasers III

Q 26.7: Talk

Wednesday, March 10, 2010, 12:00–12:15, F 128

Injection seeded frequency stabilized Nd:GSAG ring laser for water vapor detection — •Xin Wang, Adalbert Ding, and Hans Eichler — Institut für Optik und Atomare Physik, Technische Universität Berlin, Straße des 17 Juni 135, Berlin 10623, Germany

Long range water vapor DIAL systems require efficient and rugged laser sources. The quasi-three-level transition from R1 to Z5 in Nd:GSAG with 943nm wavelength is a promising candidate. An actively Q-switched Nd:GSAG ring laser was established. It was injection seeded by a tunable distributed feedback laser diode. Laser frequency was stabilized by ramp-hold-fire method. Single frequency laser pulses with 13mJ pulse energy at 10Hz repetition rate were obtained. By tuning the wavelength of the seed laser a 0.80nm tuning range of the pulsed Nd:GSAG laser was obtained. It covers the four wavelengths required by water vapor DIAL. Measured by Fabry-Perot interferometer the spectral line width was approximately 50MHz.