Bhar, G.C., Hanna, D.C., Luther-Davies, B. and Smith, R.C.
Tunable down-conversion from an optical parametric oscillator
Optics Communications, 6, (4), . (doi:10.1016/0030-4018(72)90146-0).
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A new method for the production of high power, tunable laser-like infrared radiation is described. An optical parametric oscillator (OPO) and a down-converter are combined so that radiation is generated at the frequency difference between signal and idler frequencies. In an experiment using proustite for the down-converter crystal and a 1.065 µm pumped OPO, tunable radiation has been produced over the range 8-12µm. Using CdSe in the down-converter the region 10-25µm could be spanned with peak powers approaching 100W.
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