UPPRESSING OF THE AMPLIFIED SPONTANEOUSE EMISSION FROM A FOUR-PASS LASER AMPLIFIER USING A DIFFRACTION GRATING

摘要

The present invention relates to an amplified spontaneouse emission form a four-pass laser amplifier using a diffraction grating or a absorption filter. glass).;A method for reducing spontaneous emission light generated in a quadruple laser amplifier and a crystal polarizer by using a diffraction grating or an absorption filter glass which is characterized by inserting a filter glass or a diffraction bal into a quadruple path amplifier path to reduce amplified spontaneous emission generated by the amplifier. In a quadruple amplifier path consisting of (P1) (P2) (P3) and Faraday rotator (FR) pigment gain medium (DGM) and mirror (M), the filter glass between the pigment gain medium and the third crystal polarizer (P3) Is a spontaneous emission light reduction device generated from a quadruple path laser amplifier using a diffraction grating or an absorption filter glass, characterized in that the grating is installed instead of the mirror (M4).