摘要:
本文介绍了由TEA CO2激光器的9R(12)跃迁线泵浦冷却的 CF4分子,获得 16m激光输出。泵浦光用限孔光阑得到TEMoo单横模,由低气压CO2增益池压缩线宽,并与光泵腔良好的模式匹配下,以700mJ的泵浦源能量获得25mJ左右的16m激光输出能量。光量子转换效率达7％左右。激光脉宽窄于150ns,该器件可在约0.5Hz重复率下,以20mJ的输出能量运转数千次。
Abstract:
The stimulated emission of 16 m was obtained as a result of optical pumping CF4 molecules with the 9R(12) line of TEA CO2 laser. The pump efficiency has been increased by narrowing the frequency bandwidth of CO2 pump laser with a CW gain cell, and by matching well the pump source to the pumped resonator.With a pump source energy of 700 mJ, a 25 mJ pulse energy of 16 m laser output, an optical quantum efficiency of 7%, a pulse width of less than 150 ns were obtained. This laser can be operated pulsewise several thousand times with a repetition rate of 0.5 Hz. The relations between the output energy of CF4 laser and some parameters (T, p, Ep) have been determined experimentally. The result of 9R(10) pump line is also observed, and compared with the result obtained with high pressure continously tunable CO2 laser.
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