Hannover 2010 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 26: Laser Development: Solid State Lasers III

Q 26.3: Vortrag

Mittwoch, 10. März 2010, 11:00–11:15, F 128

Laser oscillator coupling scheme using gain grating holograms in Nd:YAG — •Roland Ullmann, Robert Elsner, and Martin Ostermeyer — Institute for Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str 24/25, 14476 Potsdam, Germany

Advanced Lidar measurement methods require pulsed lasers with a high frequency stability in MHz-range or even below. To achieve this, several techniques based on active electronic feedback loops like Pound-Drever-Hall [1] can be used. A passive coupling between a frequency stable master and a pulsed slave laser would be advantageous for mobile and remote applications e.g. on a satellite. Such a passive coupling can be realized via gain gratings. Frequency fluctuations of the slave's resonator are compensated by self adjustment of the gain grating position inside the active medium. The diffraction properties of these gain gratings are experimentally investigated and compared to a numerical model. Further advantageous properties of gain gratings include self-Q-switching and phase conjugation [2]. In our scheme, a non planar ring oscillator (NPRO) is used as master laser and initializes the gain grating.

References: [1] M. Ostermeyer, T. Waltinger, M. Gregor, Opt. Commun. 282(16):3302-3307 (2009)

[2] M. J. Damzen, R. P. M. Green, and K. S. Syed, Opt. Lett. 20, 1704- (1995)