| 摘要 |
A gas laser cavity 44 comprises a first (pumped) molecular gas 52 and a second (lasing) molecular gas 52, such as Hydrogen Halides. The first gas 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 first gas 52 and a wavelength capable of pumping the first gas molecules from the ground state to an excited state. The energy of the first gas transfers to the second gas and lasing occurs in the second gas. Thus, the pumped gas may be selected based on absorption of the pumping light and the lasing gas selected based on the desired output lasing wavelength.
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