Title :
Far-field improvement of quantum cascade lasers through high-reflection coatings
Author :
Liu, W.F. ; Wang, L. ; Zhang, J.C. ; Li, Luoqing ; Liu, J.Q. ; Liu, F.Q. ; Wang, Z.G.
Author_Institution :
Key Lab. of Semicond. Mater. Sci., Chinese Acad. of Sci., Beijing, China
fDate :
1/1/2011 12:00:00 AM
Abstract :
A new approach has been developed for quantum cascade lasers to improve beam quality. Using two carefully designed high-reflection coatings, the fundamental mode was selected to have the lowest threshold current and the horizontal far-field pattern has been greatly improved, in good agreement with simulations.
Keywords :
optical films; quantum cascade lasers; beam quality improvement; far-field pattern; high-reflection coating; quantum cascade laser; threshold current;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2010.274
