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1 LIPhy-OPTIMA LIPhy - Laboratoire Interdisciplinaire de Physique Saint Martin d’Hères 2 LI¨Phy-OPTIMA LIPhy - Laboratoire Interdisciplinaire de Physique Saint Martin d’Hères

Abstract : The use of frequency-shifted feedback FSF lasers in optical metrology is based on a unique coherence property: the appearance of beats in the noise spectrum at the output of a two-beam interferometer, whose frequencies vary linearly with the path delay of the interferometer. A description of the output of a FSF laser as a moving comb of optical frequencies is generally admitted to explain these specific coherence properties. Here starting from the model of a passive FSF cavity seeded by spontaneous emission we give a rigorous description of the time-spectrum properties of FSF lasers and show that the moving comb exists only in the limit of small frequency shift.

Keywords : Frequency shifted feedback laser Laser coherence Time-frequency spectrum Gauss sums Talbot effect





Autor: H. Guillet de Chatellus - E. Lacot - W. Glastre - O. Jacquin - O. Hugon -

Fuente: https://hal.archives-ouvertes.fr/



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