CARBON-DIOXIDE GAS-DYNAMIC LASER Russian patent published in 2001 - IPC

FIELD: laser engineering; gas-dynamic lasers. SUBSTANCE: laser has hot working gas generator, nozzle unit, working section with optical-resonator cavities incorporating mirror adjustment devices, and multichannel diffuser. Hot working gas generator has flat combustion chamber and mixing unit with receiver. Flat fuel header provided at inlet of combustion chamber has its wall facing the fire bottom formed by deflector placed inside fuel cavity and provided with holes passing fuel to clearance between deflector and fire bottom and further to fuel cavity. Hot gas is also fed between deflector and partition to injectors communicating with fire bottom and with partition separating fuel and oxidizer cavities. Nitrogen mixing unit has front wall and rear wall with holes, as well as mixing members arranged in-between coaxially with respect to holes. Front wall is made in the form of set of plates joined to case and to each other for thermal expansion. Drillings are made in plates concentrically with mixing member to form slits for passing ingredient being mixed in. Outlets of slits communicate with inlets of mixing members. Power rods are placed in nozzle unit vanes inside cooling ducts and connected to power unit case. Nozzle cascade is mounted in power unit case to form working component inlet/outlet cavities within case above and under nozzle cascade. Peripheral vanes and inserts are provided on edges of nozzle cascade to form blast-curtain nozzles and their receivers. Insert has duct communicating with working-gas inlet cavity and with blast-curtain nozzle receiver. Working-gas inlet cavity communicates with working gas source. Working-gas outlet cavity communicates with hot working gas generator. Multichannel diffuser has size of its extreme duct inlet consistent with height of single-nozzle outlet of nozzle unit and with length of working section. Combustion chamber, mixing unit, receiver, and nozzle unit are assembled to form closed-circuit arrangement. Additional viewing mirror is mounted inside optical resonator behind output mirror at certain angle to laser beam. EFFECT: enhanced efficiency and operating reliability, reduced size and weight of laser. 5 cl, 8 dwg