LASER OSCILLATION DEVICE

WIPO Patent Application WO/2018/167975

A1

This laser oscillation device (100) comprises a laser light source (17) and a partial reflection mirror (14) between which there are disposed: wavelength plates (31, 32) which change the polarization direction of laser beams emitted from semiconductor lasers (11, 51) to a second direction orthogonal to a first direction; and a diffraction grating (13) which is disposed in a position at which a plurality of laser beams polarized in the first direction are superimposed into one, and at which a plurality of laser beams with the polarization direction changed to the second direction are superimposed into one. The diffraction grating (13) superimposes the plurality of laser beams polarized in the first direction so as to have a single optical axis. The diffraction grating (13) also superimposes the plurality of laser beams polarized in the second direction so as to have a single optical axis, and outputs the superimposed laser beams toward the partial reflection mirror (14). The laser oscillation device (100) is also provided with a birefringent element (16) which couples the laser beams output from the partial reflection mirror (14) having mutually different optical axes into a laser beam having a single optical axis.

KYOTO TOMOHIRO (JP)
KATSURA TOMOTAKA (JP)
MORITA DAIJI (JP)

PCT/JP2017/011041

September 20, 2018

March 17, 2017

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MITSUBISHI ELECTRIC CORP (JP)

H01S5/14; G02B27/10; H01S3/08

WO2002065191A1	2002-08-22
WO2003005106A1	2003-01-16

JP2016054295A	2016-04-14
US20070014008A1	2007-01-18
JP2004334169A	2004-11-25
EP1182481A2	2002-02-27
JP2004022679A	2004-01-22
JPS5683701A	1981-07-08

TAKAMURA, Jun (JP)

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