We demonstrate a surface-emitting photonic-crystal distributed-feedback laser, emitting at λ≈3.7μm from an antimonide type-II “W” active region. While single-mode operation was not achieved, the spectral emission linewidth for cw optical pumping was only 1.3Å. For pulsed operation with a pump-spot diameter of 0.8mm, 60% of the nearly circular output beam was transmitted through an aperture with an angular diameter approximately five times that of a Gaussian emitted beam, assuming that the emission area and pump area are the same.
No takes yet. Share an insight, caveat, or question.
Kim et al. (2006) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: