Polarization controlled tuneable ring laser

Coherent light generators – Particular beam control device – Mode discrimination

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372 94, H01S 3098

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active

055880134

ABSTRACT:
The present invention relates to a tuneable ring laser with an output having a fixed, stable linear state of polarization with a fixed and known azimuth. The state of polarization at the output is fixed by compensating for component birefringence of the various ring elements that alter the polarization state and azimuth.

REFERENCES:
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patent: 5274659 (1993-12-01), Harvey et al.
IEEE Photonics Technology Letters; "Electronically Tuneable Liquid-Crystal-Etalon Filter For High-Density WDM Systems"; M. W. Maeda et al. vol. 2, No. 11, Nov. 1990.
Electronics Letters; "Pigtailed High-Finesse Tunable Fibre Fabry-Perot Interferometers With Large, Medium and Small Free Spectral Ranges", J. Stone et al., vol. 23, Jul. 1987.

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