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Opt Lett. 2005 Sep 15;30(18):2418-20.

Dual-polarization microchip laser at 1.53 microm.

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  • 1Laboratoire d'Electronique Quantique-Physique des Lasers, UMR CNRS PALMS 6627, Universit√© de Rennes I, Campus de Beaulieu, F-35042 Rennes, France.


Two-frequency operation of a composite Er,Yb:glass-LiTaO3 monolithic microlaser is demonstrated at 1.53 microm. The thermo-optic effect of the intracavity birefringent crystal makes it possible to control the wavelengths of the two orthogonal linearly polarized eigenstates. It provides a tunable beat note from 0 to 60 GHz. Direct evaluation of the Lamb-type coupling constant C between the two eigenstates is obtained from a single intensity noise spectrum measurement, yielding values from 0.33 to 0.86, depending on transverse and axial distributions of the eigenstates. Applications to radar and telecommunication systems are discussed.

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