Abstract
We have studied the Doppler-broadened 11.76 μm 15NH3 emission line optically pumped in a ring resonator by a cw CO2 laser operating on the 10R(42) line. In the pure ammonia, even if the pumping occurs inside the Doppler width, the two-photon Raman process seems to be responsible for the laser emission. Both in the pure 15NH3 and in the 15NH3, N2, and He mixture we demonstrate the possibility of obtaining a unidirectional laser amplifier.
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References
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This work has been supported by Direction des Recherches Etudes et Techniques under contract No. 87/222