High extraction efficiency cylindrical ring resonator
Patent
·
OSTI ID:5512551
An annular ring resonator for a high-energy laser is described having high extraction efficiency, and comprising: a conical rear mirror; a scraper mirror; a first axicon positioned to receive a generally cylindrical beam from the scraper mirror, and to produce and expanded annular beam to pass through an annular gain region to the conical rear mirror; a second axicon, in opposing position to the first axicon, for receiving an annular beam reflected from the conical rear mirror, and producing a generally cylindrical compacted beam for transmission to the scraper mirror, wherein the scraper mirror has an aperture to pass a return beam for transmission to the first axicon; and optical means for transmitting the compacted beam from the second axicon to the scraper mirror and from the scraper mirror to the first axicon; whereby the annular beam makes two passes through the gain region, and the combination of two types of axicons and the conical mirror has substantially no net effect on polarization.
- Assignee:
- TRW, Inc., Redondo Beach, CA
- Patent Number(s):
- US 4598408
- OSTI ID:
- 5512551
- Country of Publication:
- United States
- Language:
- English
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