LASER OSCILLATOR, AND WAVELENGTH SWITCHING DEVICE

• Main Authors: SHODA FUMIO, YANAGISAWA TAKAYUKI, SAKAI KOHEI, AKINO YOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 30.07.2015
• Subjects: BASIC ELECTRIC ELEMENTS; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DEVICES USING STIMULATED EMISSION; ELECTRICITY; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To provide a laser oscillator arranged to be able to switch two of fundamental waves of laser light such as RGB.SOLUTION: A laser oscillator comprises: a first reflection mirror which reflects light of a first wavelength; a second reflection mirror which reflects light of the first wavelength and light of a second wavelength; a laser medium which is set on an optical axis of light travelling back and forth between the first and second reflection mirrors; a wavelength-conversion element which performs a second harmonics conversion of light amplified by the laser medium to output to the second reflection mirror; VBG which is provided on a light reflection plane of the first reflection mirror and reflects light of the second wavelength according to the incident angle of light incident from the laser medium; and an angle-adjustment mechanism which holds the first reflection mirror, and drives the first reflection mirror so that the reflection plane of the first reflection mirror and VBG form a perpendicular or particular angle with respect to the optical axis. 【課題】ＲＧＢ等の基本波レーザ光のうち２つを切り替え可能なレーザ発振器を提供する。【解決手段】本発明は、第１波長の光を反射する第１の反射ミラーと、第１波長及び第２波長の光を反射する第２の反射ミラーと、第１の反射ミラーと第２の反射ミラーとの間を往復する光の光軸上に設置されるレーザ媒質と、レーザ媒質により増幅された光を第２高調波変換して第２の反射ミラーに出力する波長変換素子と、第１の反射ミラーの光の反射面に設けられ、レーザ媒質から入射する光の入射角に応じて第２波長の光を反射するＶＢＧと、第１の反射ミラーを保持し、第１の反射ミラー及びＶＢＧの反射面が光軸に対して垂直又は特定の角度を形成するよう第１の反射ミラーを駆動する角度調整機構とを備えることを特徴する。【選択図】 図１