Patent ID: 9484704
Filing Date: 2016-11-01
CPC Classification: H01S

Claim Text:
1. A laser oscillator comprising: an electric discharge excitation part which has a discharge tube extending in one direction, and generates laser by excitation discharge of a laser gas flow through the inside of said discharge tube, an optical resonance part which has optical components attached to outsides of end walls in the extension direction of said discharge tube, and resonates laser which is generated in said discharge tube, and blower piping which connects an intake port and exhaust port of said discharge tube to form a circulation path of laser gas, wherein said end walls of said discharge tube are provided with through holes which connect the inside of said discharge tube and said optical components, and blocking members are arranged in said through holes and provided for reducing the cross-sectional areas of the through holes, so as to block the laser gas flow through said through holes toward said optical components, and an inner diameter of each blocking member is equal to or larger than a diameter of a reflective area of resonator mirrors which are attached to the optical components, and at least one blocking member is mounted to the laser oscillator by a single rib that is positioned through a hole disposed in the end wall.