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Frequency modulated laser beam with highly efficient intensity stabilisation

Frédéric Du Burck·Assia Tabet·Olivier Lopez
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Abstract

We analyse the limitation of the amplitude modulation rejection due to the spatial modulation of the output beam of an acousto-optic modulator used in an active laser beam stabilisation system when a frequency modulation of a few megahertz is applied to this modulator. We show how to overcome this problem, using a single mode optical fibre at the output of the modulator. A residual amplitude modulation of 10-5 is achieved.

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Frédéric Du Burck, Assia Tabet, Olivier Lopez. 2005-06-17. Frequency modulated laser beam with highly efficient intensity stabilisation. https://arxiv.org/abs/quant-ph/0506146

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