High extraction efficiency cylindrical ring resonator

Details High extraction efficiency cylindrical ring resonator High extraction efficiency cylindrical ring resonator

1984-10-22

1986-07-01

Scott, Jr., Leon

Coherent light generators

Particular resonant cavity

Folded cavity

372 95, 372 99, 372103, 372108, 350619, H01S 3083

Patent

active

045984085

ABSTRACT:
An annular ring resonator for a high-energy laser, including a waxicon/reflaxicon pair and a conical rear mirror, which combine to provide high energy extraction efficiency, reduced sensitivity to alignment errors, and no polarization state mixing. A cylindrical beam returned from a scraper mirror is first expanded by the waxicon to an annular beam that makes a first pass through a gain region of the laser. The annular beam impinges on the conical mirror and is reflected as an annular beam, to make a second pass of the gain region before encountering the reflaxicon, which compacts the beam for transmission to the scraper mirror. One embodiment employs a double-cone rear mirror, and another employs a single conical surface. The structure may also employ feedback decentering.

REFERENCES:
patent: 4514850 (1985-04-01), Holmes et al.
patent: 4516244 (1985-05-01), Holmes

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