Coherent light generators – Particular resonant cavity – Unstable resonator
Patent
1990-10-16
1991-08-27
Scott, Jr., Leon
Coherent light generators
Particular resonant cavity
Unstable resonator
372 20, 372103, H01S 308
Patent
active
050439987
ABSTRACT:
An unstable resonator laser cavity providing high power radiation with diaction-limited divergence and narrow-bandwidth comprises a gain medium for generating and amplifying laser radiation optically coupled to a reflector via a frequency narrowing element for providing feedback and bandwidth-narrowing of the laser radiation travelling between the gain medium and the reflector. A telescopic ring is optically coupled to the gain medium opposing the reflector. The telescopic ring comprises a polarized beam splitter, which transmits a first polarization polarized laser radiation into the telescopic ring travelling in a first direction and reflects a second polarization polarized laser radiation into the telescopic ring travelling in a second direction; first and second rotators for rotating the first polarization polarized laser radiation to provide second polarization polarized laser radiation travelling in the first direction; and lenses for magnifying the second polarization polarized laser radiation travelling in the first direction onto the polarized beam splitter, which reflects the second polarization polarized laser radiation produced by the first and second rotators back into the gain medium. A scraper mirror, located between the gain medium and the reflector, provides the output beam.
REFERENCES:
patent: H99 (1986-08-01), Jones et al.
patent: 4354271 (1982-10-01), Hon
patent: 4520484 (1985-05-01), Huignard et al.
patent: 4802176 (1989-01-01), O'Meara
patent: 4868515 (1989-09-01), Reintjes et al.
Cooper David G.
Dexter James L.
Reintjes John F.
Tankersley Lawrence L.
Jameson George
Jr. Leon Scott
McDonnell Thomas E.
United States of America as represented by the Secretary of the
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