Increasing the output of a Littman-type laser by use of an intracavity Faraday rotator

Details Increasing the output of a Littman-type laser by use of an intracavity Faraday rotator Increasing the output of a Littman-type laser by use of an intracavity Faraday rotator

2005-09-30

arxiv.org/abs/physics/0509263v1

Appl. Opt., 43, 3910-3914 (July 2004)

Physics

Optics

5 pages, 2 figures

Scientific paper

We present a new method of external-cavity diode laser grating stabilization which combines the high output power of the Littrow design with the fixed output pointing of the Littman-Metcalf design. Our new approach utilizes a Faraday-effect optical isolator inside the external cavity. Experimental testing and a model which describes the tuning range and optimal tuning parameters of the laser are described. Preliminary testing of this design has resulted in a short-term linewidth of 360 kHz and a side-mode suppression of 37 dB. The laser tunes mode-hop free over 7 GHz and we predict that much larger tuning ranges are possible.

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