STRONTIUM LASER Russian patent published in 2012 - IPC H01S3/227 H01S3/134 

FIELD: physics.

SUBSTANCE: laser contains a gas-discharge tube with a weighed amount of strontium metal inside and electrodes at its ends, an optical resonator with returning and transmitting mirrors, a laser radiation power metre and a computer-controlled pulsed current power supply. The power supply is connected by its positive terminal to one of the inputs of the computer. The returning mirror of the resonator is in form of a plate made from a substance which transmits radiation in the range of at least (1.03-3.1) mcm, for example monocrystalline calcium fluoride (CaF₂) or barium fluoride (BaF₂). One side of this plate is coated with a layer of a substance which reflects infrared radiation in the range of at least (1.03-3.1) mcm and has reflection coefficient not less than 90%. The layer of this substance is such that the returning mirror of the resonator allows transmission of (0.1-1.0)% of incident infrared radiation, and the other side of this plate is coated with a layer of a substance which selects infrared radiation in the (1.03-3.1) mcm range. The transmitting mirror is in form of a plate of monocrystalline calcium fluoride (CaF₂) or barium fluoride (BaF₂) and one side of this plate is coated with a layer of aluminium or silver whose thickness provides 50% transmission of infrared radiation. The radiation power metre is placed such that its optical input is connected to the returning mirror of the resonator and its electrical output is connected to one of the inputs of the computer.

EFFECT: reduced power loss of the generated radiation, high reliability and simple design.

5 cl, 1 dwg