| 摘要 |
A gas laser cavity 44 comprising a molecular gas 52, such as a Hydrogen Halide, is pumped by a plurality of semiconductor lasers 20 which provide light carried along optical fibers 26 that provide divergent light 32 to a collimating lens 34 that provides collimated light 36 to a focussing lens 38 that provides pumping light 40 which propagates within the gas laser cavity 44 in a zig-zag pattern, thereby providing a homogeneously excited medium and providing sufficient pathlength to give adequate absorption of the pump light. The pump light 40 has a wavelength within the absorption frequency band of the gas 52 and a wavelength capable of pumping the gas molecules from the ground state to an excited state. Alternatively, the absorption frequency band of the gas 52 may be broadened by adding an inert gas, such as Argon, at a higher pressure than the Hydrogen Halide gas. Also, the output wavelength of the laser diodes 20 may be tuned to the center of the absorption frequency band of the gas 52 by adjusting the temperature of the diodes with thermoelectric coolers 28.
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