Patent ID: 9685756
Date: 2017-06-20
CPC Classifications: G03F,H01S,H05G

Claim:
1. A laser amplifier, comprising: a chamber containing a laser medium; a first window provided on the chamber, and tilted to allow a laser light beam of a desired wavelength inputted from outside of the chamber to enter the chamber and to allow light beams of one or more suppression target wavelengths different from the desired wavelength to be off a light path of the laser light beam of the desired wavelength; an excitation unit configured to amplify, by exciting the laser medium, the laser light beam that has entered the chamber; a second window provided on the chamber, and tilted to allow the laser light beam that has been amplified by the excitation unit to exit from the chamber to the outside and to allow the light beams of the one or more suppression target wavelengths to be off the light path of the laser light beam of the desired wavelength; a mirror provided on a laser light path between the first window and the second window; and a wavelength selection film provided on one or more of the first window, the second window, and the mirror, and configured to suppress propagation of the light beams of the one or more suppression target wavelengths.