Title:
LASER APPARATUS AND METHOD FOR MANUFACTURING OPTICAL ELEMENT
Document Type and Number:
WIPO Patent Application WO/2018/229854
Kind Code:
A1
Abstract:
This laser apparatus is provided with an optical element which is formed from a CaF2 crystal, which receives an ultraviolet laser beam obliquely entering one surface thereof, through which the ultraviolet laser beam transmits, and in which the electric field axis of a P-polarized light component, with respect to the surface, of the laser beam propagating thereinside coincides with one axis included in <111> of the CaF2 crystal. This method for manufacturing the optical element includes a step for cutting an ingot perpendicularly to a cutting axis, the ingot being formed by causing crystal growth of a seed crystal of CaF2 in one axial direction included in <111>, the cutting axis being defined as an axis that is inclined at an angle within the range of 14.18±5° from the direction of the crystal growth toward the direction of another axis which is included in <111> and is different from the axis in the direction of the crystal growth.
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Inventors:
TEI DAISUKE (JP)
WAKABAYASHI OSAMU (JP)
WAKABAYASHI OSAMU (JP)
Application Number:
PCT/JP2017/021758
Publication Date:
December 20, 2018
Filing Date:
June 13, 2017
Export Citation:
Assignee:
GIGAPHOTON INC (JP)
International Classes:
H01S3/10; H01S3/086
Domestic Patent References:
| WO2003009017A1 | 2003-01-30 |
Foreign References:
| JP2014225700A | 2014-12-04 | |||
| JP2006073921A | 2006-03-16 | |||
| JPH11177173A | 1999-07-02 | |||
| JP2008116940A | 2008-05-22 |
Attorney, Agent or Firm:
HOSAKA Nobuhisa (JP)
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