Coherent light generators – Particular resonant cavity – Unstable resonator
Patent
1992-06-26
1993-11-09
Bovernick, Rodney B.
Coherent light generators
Particular resonant cavity
Unstable resonator
372 99, H01S 308
Patent
active
052609642
ABSTRACT:
A resonator for the modal control of a laser with a gain medium having a non-circular cross-section in a plane perpendicular to the optical axis of the resonator. It has a graded reflectivity mirror as the output coupler. The graded reflectivity mirror consists of a partial reflector which has a reflectivity that varies gradually according to the position on the mirror's surface. The resonator is either astigmatic or the graded reflectivity mirror has a non circularly symmetric reflectivity profile or both. It allows the production of a good optical quality beam with an efficient energy extraction.
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Duplain Gaetan
Morin Michel
Bovernick Rodney B.
Institut National D'Optique
Wise Robert E.
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