Patent ID: 9722386
Date: 2017-08-01
CPC Classifications: H01S

Claim:
1. A laser oscillator comprising: a gas flow channel through which a gas medium which amplifies light circulates; a blower which is disposed at the gas flow channel and makes the gas medium to circulate; and a heat exchanger which is disposed at the gas flow channel and cools the gas medium; wherein the heat exchanger includes a frame body, a cooling part which performs heat exchange between the gas medium and a cooling medium, a tubular member fixed to the frame body, and a foreign matter collection container which collects the foreign matter contained in the gas medium, the tubular member has an inlet portion of an interior flow channel communicating with an interior space of the frame body and an outlet portion of the interior flow channel connected to the gas flow channel, the cooling part is disposed so that the gas medium flowing out of the cooling part flows toward an outer surface of the tubular member, the tubular member is disposed so that the gas medium which flows out of the cooling part moves along the outer surface of the tubular member and then changes a proceeding direction to flow into the inlet portion, and the foreign matter collection container is disposed at a location to face the inlet portion of the tubular member and formed to be capable of collecting the foreign matters separated from a flow of the gas medium.