Patent ID: 9209598
Filing Date: 2015-12-08
Classification: H01L,H01S

Abstract:
1. Apparatus for cryogenically cooling solid-state laser oscillator or amplifier material, comprising: a heat exchanger using liquid nitrogen for cooling a cryogenic liquid to a chosen temperature below its boiling point and above its freezing temperature; a cooling head having an opening to which the first flat face of said oscillator or amplifier material is sealed, a cryogenic liquid inlet and a cryogenic liquid outlet for flowing the cryogenic liquid passed and in contact with said oscillator or amplifier material; a pump for flowing said cooled cryogenic liquid through said cooling head, at a rate sufficient to ensure that the cryogenic liquid remains below its boiling temperature throughout said entire apparatus; a chamber capable of being evacuated to a chosen vacuum, having a window spaced-apart from said laser oscillator or amplifier material, for surrounding said cooling head and said laser amplifier material sealed thereto; and a vacuum pump for evacuating said chamber.