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Opt Lett. 2015 Jun 15;40(12):2696-8. doi: 10.1364/OL.40.002696.

Tilt-tuned etalon locking for tunable laser stabilization.

Optics letters

Bradley M Gibson, Benjamin J McCall

PMID: 26076239 DOI: 10.1364/OL.40.002696

Abstract

Locking to a fringe of a tilt-tuned etalon provides a simple, inexpensive method for stabilizing tunable lasers. Here, we describe the use of such a system to stabilize an external-cavity quantum cascade laser; the locked laser has an Allan deviation of approximately 1 MHz over a one-second integration period, and has a single-scan tuning range of approximately 0.4  cm(-1). The system is robust, with minimal alignment requirements and automated lock acquisition, and can be easily adapted to different wavelength regions or more stringent stability requirements with minor alterations.

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