Patent ID: 6434181
Filing Date: 2002-08-13
Classification: H01S

Abstract:
A gas laser oscillator comprising:(a) discharge tubes disposed along the optical axis of a laser beam for forming a discharge space inside of said discharge tubes, (b) a fully reflective mirror disposed toward a first opening of said discharge space for composing a terminal mirror, (c) a partially reflective mirror disposed toward a second opening of said discharge space for composing an output mirror, (d) a switching power source for composing a high voltage power source for generating discharge inside said discharge tubes, (e) a step-up transformer for composing a high voltage power source for generating discharge inside said discharge tubes, said step-up transformer including the following: (1) a step-up transformer main body, (2) a transformer container for storing insulating oil for immersing said step-up transformer main body in the insulating oil, and (3) an oil cap having a penetration hole and a filter having resistance to passing of insulating oil in the penetration hole by forming an oil film of the insulating oil, said oil cap being fitted to said transformer container; and (f) a rectifying and smoothing circuit for composing a high voltage power source for generating discharge inside said discharge tubes.