Lasing without Inversion : An Experimental Reality
Lasing without inversion (LWI)  opens new horizons for laser physics not only because it overcomes a commonly accepted limitation for lasers, but also because it provides a new tool in the quest for ultra-violet and X-ray lasers. As one moves towards higher frequencies of lasers, the rate of spontaneous emission grows as the third power of frequency, so the pumping power required to create inversion scales as the forth power of frequency. LWI significantly decreases pumping power requirements and allows lasing with much higher frequency to the ground state (since otherwise it is difficult to create inversion).
KeywordsProbe Field Lasing Level Coherent Population Trapping Driving Field Pump Field
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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