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1 December 1990 Transverse feedback enhancement in miniature OPFIRI
Yao Li
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Proceedings Volume 1514, 15th International Conference on Infrared and Millimeter Waves; 15145Y (1990) https://doi.org/10.1117/12.2301624
Event: 15th International Conference on Infrared and Millimeter Waves, 1990, Orlando, FL, United States
Abstract
The very short ASE OREiRL had been studied experimentally and theoretically. According to the result given in ref.[l] that, the optimum operating gas pressure of ASE OPFIRL was inversely proportional to the length of sample tube of the laser. So if the operating gas was increased to tens Torrs, then the length of the sample tube of optically pumped ASE FIR laser could be as short as several centimeters. This prediction was proved experimentally. We increased the operating gas pressure to tens Torrs, the OPFIRL lased successfully when the length of sample tube decreased to less than 5cm. The old theoretical model could hardly give correct answer for this k.nd of system. The calculated output power of OPFIRL was in the order of 10-10 W/cm2 , and the value of optimum operating gas pressure was twice as large as measured value.

Under the enlighten of experimental results, we found that the transverse feedback from the side wall of sample tube played an important role in the miniature OPFIRL. A new theoretical model of OPFIRL including transverse feedback was proposed. By using new model, the calculated optimum operating gas pressure was in good agreement with experimental value as shown in Fig.10. Sets of theoretical curves for the design of miniature OPFIRL were given.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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Yao Li "Transverse feedback enhancement in miniature OPFIRI", Proc. SPIE 1514, 15th International Conference on Infrared and Millimeter Waves, 15145Y (1 December 1990); https://doi.org/10.1117/12.2301624
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KEYWORDS
Far infrared lasers
Lithium
Optical pumping
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