Mode selection by synchronous pumping of a wagon wheel...

Details Mode selection by synchronous pumping of a wagon wheel... Mode selection by synchronous pumping of a wagon wheel...

2011-03-15

2011-03-15

Harvey, Minusn (Department: 2828)

Coherent light generators

Particular active media

Active media with particular shape

C372S067000, C372S070000

Reexamination Certificate

active

07907655

ABSTRACT:
A laser cavity structure is disclosed which pertains to laser resonator geometries possessing circular symmetry, such as in the case of disk or spherical lasers. The disclosed invention utilizes a very-high finesse Bragg reflector (VHF-BR) thin film reflectors of many layer pairs of very small refractive index difference, the VHF-BR deposited on a surface of revolution, thereby forming an optical cavity. These dielectric reflectors are disposed in such a way as to allow selection of preferred low order modes and suppression of parasitic modes while allowing a high cavity Q factor for preferred modes. The invention disclosed, in its preferred embodiments, is seen as particularly useful in applications requiring high efficiency in the production and coupling of coherent radiation. This is accomplished in a cavity design that is relatively compact and economical.

REFERENCES:
patent: 3521189 (1970-07-01), Koenig
patent: 4799224 (1989-01-01), Bottacchi et al.
patent: 4897844 (1990-01-01), Schimpe
patent: 5548610 (1996-08-01), Bouadma et al.

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