Patent ID: 6859480

Claim:
A device a operatable for simultaneously producing laser radiation having two different wavelengths, the device comprising: a Tm:YAG sample; and a source of pumping radiation having a wavelength of about 1 μm, the source of pumping radiation comprising: a resonant cavity that includes a pair of first and second spaced apart members that are substantially reflective to radiation having a wavelength of about 1 μm, wherein, as compared to the second member, the member is selected to have a lower reflectively of wave lengths of about 1 μm; Nd:YAG sample interposed between the first and second members wherein a portion of pumping radiation having a wavelength of about 1 μm is emitted through the first member as a laser beam; a source of pumping radiation for the Nd:YAG sample; the resonant cavity also having the Tm:YAG sample located therein and between a second pair of members, one of which second pair of members is substantially reflective to radiation having a 2 μm wavelength, the Nd:YAG sample being arranged so that at least some of the radiation produced by the source is absorbed by the Tm:YAG sample, causing the Tm:YAG sample to emit a second laser beam with radiation having a wavelength of about 2 m.