4.5 μm wavelength vertical external cavity surface emitting laser operating above room temperature

Rahim, M.; Khiar, A.; Felder, F.; Fill, M.; Zogg, H.
May 2009
Applied Physics Letters;5/18/2009, Vol. 94 Issue 20, p201112
Academic Journal
A midinfrared vertical external cavity surface emitting laser with 4.5 μm emission wavelength and operating above room temperature has been realized. The active part consists of a single 850 nm thick epitaxial PbSe gain layer. It is followed by a 2 1/2 pair Pb1-yEuyTe/BaF2 Bragg mirror. No microstructural processing is needed. Excitation is done optically with a 1.5 μm wavelength laser. The device operates up to 45 °C with 100 ns pulses and delivers 6 mW output power at 27 °C heat-sink temperature.


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