Unstable laser resonator

Details Unstable laser resonator Unstable laser resonator

1995-01-13

1996-09-17

Scott, Jr., Leon

Coherent light generators

Particular resonant cavity

Unstable resonator

372 99, 372 92, 372 98, H01S 308

Patent

active

055576303

ABSTRACT:
The present invention is directed to an unstable laser resonator. The present invention includes a first mirror located adjacent one end of a laser gain medium, and a second output mirror/lens where one surface acts as a mirror and the other surface acts as a collimating lens located adjacent an opposite end of a laser gain medium. Both mirrors include combinations of convex, concave and plano surfaces in order to achieve small fresnel number light with diffraction limited light properties and high energy extraction associated with a large fresnel number. The output coupler provides a means to extract and collimate the light out of the cavity and feedback into the laser gain medium high quality laser light for sustaining the diffraction limited performance while the gain medium is excited.

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