Low-threshold optically pumped λ=4.4 μm vertical-cavity surface-emitting laser with a PbSe quantum-well active region

Felix, C. L.; Bewley, W. W.; Vurgaftman, I.; Lindle, J. R.; Meyer, J. R.; Wu, H. Z.; Xu, G.; Khosravani, S.; Shi, Z.
June 2001
Applied Physics Letters;6/11/2001, Vol. 78 Issue 24, p3770
Academic Journal
We report pulsed emission from an optically pumped lead-salt vertical-cavity surface-emitting laser with a PbSe/PbSrSe quantum-well active region. The lasing wavelength of λ=4.44 μm is nearly constant over the temperature range 200-280 K, and the threshold is only 10.5 kW/cm2 at 260 K, where the gain peak and cavity mode are in resonance. Over 330 mW of peak power is emitted at 260 K, into a circular beam whose divergence angle increases with pump intensity. © 2001 American Institute of Physics.


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