光泵CF4 16微米激光器
AN OPTICALLY PUMPED CF4 LASER
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摘要: 本文介紹了由TEA CO2激光器的9R(12)躍遷線泵浦冷卻的 CF4分子,獲得 16m激光輸出。泵浦光用限孔光闌得到TEMoo單橫模,由低氣壓CO2增益池壓縮線寬,并與光泵腔良好的模式匹配下,以700mJ的泵浦源能量獲得25mJ左右的16m激光輸出能量。光量子轉(zhuǎn)換效率達(dá)7％左右。激光脈寬窄于150ns,該器件可在約0.5Hz重復(fù)率下,以20mJ的輸出能量運(yùn)轉(zhuǎn)數(shù)千次。
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關(guān)鍵詞:
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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