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Applied Physics Letters : Large cavity quantum cascade lasers with InP interstacks

By A. Bismuto, T. Gresch, A. Bächle, and Jérôme Faist

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Book Id: WPLBN0002169186
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 9 December 2008

Title: Applied Physics Letters : Large cavity quantum cascade lasers with InP interstacks  
Author: A. Bismuto, T. Gresch, A. Bächle, and Jérôme Faist
Volume: Issue : December 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Applied Physics Letters Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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T. Gresch, A. Bächle, And Jérôme Fais, A. B. (n.d.). Applied Physics Letters : Large cavity quantum cascade lasers with InP interstacks. Retrieved from http://www.worldjournal.org/


Description
Description: Multicore quantum cascade lasers with large cavities show low optical losses, high saturation intensity, and low beam divergence. We present a four active core laser based on InGaAs–AlInAs material system emitting at 10.5 μm. To improve thermal conductance, InP interstacks were used to separate active regions. Selective lateral etching of the active regions was used to reduce optical losses. Peak powers up to 4.6 W, average powers up to 310 mW, and wall-plug efficiencies up to 4.6% were measured at 300 K. A far field with full width at half maximum of 18.7° and 49.8° in the lateral and in the growth direction, respectively, was observed.

 
 


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