Invention Application
- Patent Title: OPTICAL RESONATOR
- Patent Title (中): 光学共振器
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Application No.: US14887463Application Date: 2015-10-20
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Publication No.: US20160118769A1Publication Date: 2016-04-28
- Inventor: Tatsuya NARUMI
- Applicant: MITUTOYO CORPORATION
- Applicant Address: JP Kanagawa
- Assignee: MITUTOYO CORPORATION
- Current Assignee: MITUTOYO CORPORATION
- Current Assignee Address: JP Kanagawa
- Priority: JP2014-216911 20141024
- Main IPC: H01S5/024
- IPC: H01S5/024 ; H01S3/16 ; H01S5/022 ; H01S3/105 ; H01S3/094

Abstract:
An optical resonator includes a casing and various optical elements (laser crystal, SHG, etalon, movable mirror) provided within the casing. The optical resonator causes light from the excited laser crystal to resonate and, using the etalon, emits single longitudinal mode laser light. The casing is formed with a low thermal expansion metal exhibiting a thermal expansion coefficient within a range of 0.1 to 3.0×10−6K−1 and thermal conductivity within a range of 10 to 15 W·m−1·K−1. A first temperature control system controlling the temperature of the laser crystal and SHG to be a constant temperature is provided at a placement portion of the laser crystal and SHG. An angle adjuster adjusting an incident angle of the etalon and a second temperature control system controlling the temperature of the etalon to be a constant temperature are provided at a placement portion of the etalon.
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