Laser oscillation apparatus

Details Laser oscillation apparatus Laser oscillation apparatus

1995-08-11

1997-12-09

Bovernick, Rodney B.

Coherent light generators

Particular resonant cavity

Folded cavity

372 99, H01S 3081

Patent

active

056967870

ABSTRACT:
An external optical system is simplified in construction so that a laser oscillation apparatus is low-priced and compact as a whole. On the side of one end portion (10A) of a return-type resonator (10), a laser beam is reflected by a polarizing mirror (147) to be incident upon a polarizing mirror (146) which is situated diagonally below the mirror (147), and is also reflected by a polarizing mirror (142) to be incident upon a polarizing mirror (141) which is situated diagonally above the mirror (142). Thus, at the one end portion (10A), the polarizing mirror (141) and the like are arranged so that optical axes cross each other. Since the emitted laser beam forms a linear polarized beam inclined at an angle of 45.degree. to a horizontal plane, as indicated by arrow (100), the laser beam can be subjected to circular polarization by using only one 1/4-wavelength mirror. Thus, the construction of the external optical system can be simplified. Since the optical axes cross each other at the return side, moreover, the construction can be made compact as a whole.

REFERENCES:
patent: 3404349 (1968-10-01), Rigrod
patent: 4740986 (1988-04-01), Reeder
patent: 4891820 (1990-01-01), Rando et al.
patent: 4977574 (1990-12-01), Karabe
patent: 5052017 (1991-09-01), Hobart et al.
patent: 5148443 (1992-09-01), Du et al.

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