Laser frequency stabilization using direct and offset locking techniques

D. Werner1, S. Schilt1, L. Thévenaz1, C. Affolderbach2, G. Mileti2, R. Matthey2
1 Laboratory of Nanophotonics and Metrology (NAM), Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland; 2 Cantonal Observatory of Neuchatel (ON), Neuchatel, Switzerland
Stabilization of laser diodes at precise and stable frequencies is of great importance in many applications, such as high-resolution spectroscopy and differential absorption LIDAR (DIAL). Frequency stabilization is generally performed by using atomic or molecular absorption lines (direct locking). However, it is sometimes necessary to lock a laser at a frequency located outside of any absorption peaks. In this case, an offset-locking configuration is necessary, in which a so-called slave laser is locked at a given frequency difference with respect to a stabilized master laser. In this poster, we present first experimental results on the stabilization of several lasers, using both direct locking on a molecular absorption line and offset-locking with frequency differences up to 20 GHz.
Spektroskopie, Lasertechnik
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105. Tagung, Poster: P51