Patent ID: 9722385
Date: 2017-08-01
CPC Classifications: H01S

Claim:
1. A laser chamber for a discharge excited gas laser apparatus, comprising: a first discharge electrode disposed in the laser chamber; a second discharge electrode disposed to face the first discharge electrode in the laser chamber; a fan configured to flow laser gas between the first discharge electrode and the second discharge electrode; a first insulating member disposed upstream and downstream of a laser gas flow from the first discharge electrode; a first metallic damper member disposed upstream of the laser gas flow from the second discharge electrode; a second metallic damper member disposed downstream of the laser gas flow from the second discharge electrode; and a second insulating member disposed downstream of the laser gas flow from the second discharge electrode, and having a base end that contacts to a downstream side surface of the second discharge electrode, the second insulating member extending from the base end toward the downstream of the laser gas flow, wherein the second metallic damper member has a tapered surface which tapers from the upstream to the downstream, and the second insulating member is disposed on the tapered surface of the second metallic damper member, along the slope of the tapered surface.