FIR emissions from a laser cavity having a zig-zag axis

FIR emissions in three directions from a FIR NH/sub 3/ laser cavity having a zig-zag axis were observed when radiation from a pump CO/sub 2/ laser with multiple or single modes was linearly injected into the cavity. The temporal variation and Fabry-Perot interferogram of these emissions showed that the FIR zig-zag emission is dominated by a laser process due to a population inversion, while the other forward and backward emissions are due to a Raman process.<
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