The tapered quantum cascade lasers operating at about 9.0/zm are reported. In contrast to the common ridge waveguide laser, tapered devices give rather small horizontal beam divergence. Performances of devices with id...The tapered quantum cascade lasers operating at about 9.0/zm are reported. In contrast to the common ridge waveguide laser, tapered devices give rather small horizontal beam divergence. Performances of devices with identical 11 μm ridge waveguide sections and different tapered gain sections are comparatively studied. The optimal taper angle of 3° leads to a relative high output power and a very small horizontal beam divergence of 7.1 °.展开更多
基金supported by the National Science Fund for Distinguished Young Scholars(No.60525406)the National Natural Science Foundation of China(Nos,60736031,60806018,60906026)+1 种基金the National Basic Research Program of China(No.2006CB604903)the National High-Tech R&D Program of China(Nos.2007AA03Z446,2009AA03Z403).
文摘The tapered quantum cascade lasers operating at about 9.0/zm are reported. In contrast to the common ridge waveguide laser, tapered devices give rather small horizontal beam divergence. Performances of devices with identical 11 μm ridge waveguide sections and different tapered gain sections are comparatively studied. The optimal taper angle of 3° leads to a relative high output power and a very small horizontal beam divergence of 7.1 °.
