Hoya Corporation

Quantel International, Inc.

Hoya Photonics, Inc.

Jean-marc Heritier

Andrea L. Caprara

Andrea L Caprara

Jean-Marc Heritier

The use of feedback circuit in a laser device with a frequency selective element such as an etalon allows for the production of a substantially single longitudinal mode output indefinitely. The feedback circuitry is adapted to adjust the length of the laser cavity so that a longitudinal mode of the laser device is near transmission peak of the frequency selective element.

Single longitudinal mode laser without seeding

A Q-switched pulsed laser resonant cavity having an output coupling mirror with a radially variable reflectivity function across its surface and a magnification level that combine to provide a very high discrimination against transverse modes of oscillation higher than a desired fundamental mode. This resonant cavity is especially adapted for use with injection seeding to limit the longitudinal modes of oscillation to one mode. The cavity arrangement develops a high powered light pulsed beam at its output that also has a uniform intensity profile.

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San Jose, CA, United States of America

Andrea L Caprara