Frequency locking of a Nd:YAG laser using the laser itself as the optical phase modulator
- 1 April 1995
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 66 (4) , 2785-2787
- https://doi.org/10.1063/1.1145555
Abstract
We report frequency locking of a Nd:YAGtunable laser to a 2000 finesse 87‐cm‐long Fabry–Pérot cavity in air using the Pound–Drever technique. The novelty is that the necessary phase modulation of the beam is obtained using the laser directly instead of an external phase modulator (Pockels cell). The spurious relative amplitude modulation using this method was ∼3×10−5 with a modulation index β∼1 and the spectral density of the frequency difference between the laser and the cavity is below 1 mHz/√Hz in the region 1–500 Hz.Keywords
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