초록

A repetitively pulsed gas laser in which a system of mechanical shutters bracketing the laser cavity manipulate pressure waves resulting from residual energy in the cavity gas following a lasing event so as to draw fresh gas into the cavity and effectively pump spent gas in a dynamic closed loop.

대표청구항 ▼

In a repetitively pulsed gas laser comprising a lasing cavity in a laser duct having open upstream and downstream ends, means for initiating a lasing event in said cavity and means for defining a closed loop gas path including inlet and exhaust chambers connected to said duct ends, the improvement c

In a repetitively pulsed gas laser comprising a lasing cavity in a laser duct having open upstream and downstream ends, means for initiating a lasing event in said cavity and means for defining a closed loop gas path including inlet and exhaust chambers connected to said duct ends, the improvement comprising first and second gas shutter means for opening and closing said duct to the passage of gas and pressure pulses therethrough disposed in spaced relation along said duct on opposite sides of said cavity between said open ends, and control means coupled to said initiating means and to said shutter means for sequentially operating said first and second shutter means so as to stabilize gas pressure in said cavity preparatory to lasing events and utilize pressure waves caused by lasing events to draw fresh lasing medium into said cavity after lasing events.