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Proceedings Paper

Electrically tunable group delays using quantum wells in a distributed Bragg reflector
Author(s): Thomas R. Nelson Jr.; John P. Loehr; Qianghua Xie; James E. Ehret; Joseph E. Van Nostrand; Lisa Gamble; Darryl K. Jones; Spencer T. Cole; Rebecca H. Trimm; William M. Diffey; Richard Lynn Fork; Andrew S. Keys
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Paper Abstract

We present an optical delay line structure incorporating InxGa1-xAs quantum wells in the GaAs quarter- wave layers of a GaAs/AlAs distributed Bragg reflector. Applying an electric field across the quantum wells shifts and broadens the e1-hh1 exciton peak via the quantum- confined Stark effect. Resultant changes in the index of refraction thereby provide a means for altering the group delay of an incident laser pulse. Theoretical results predict tunable delays on the order of 50 fs for a 30-period structure incorporating 3 quantum wells per GaAs layer. Structure design, growth and fabrication are detailed. Preliminary group delay measurements on large-area samples with no applied bias are presented.

Paper Details

Date Published: 26 July 1999
PDF: 12 pages
Proc. SPIE 3714, Enabling Photonic Technologies for Aerospace Applications, (26 July 1999); doi: 10.1117/12.354675
Show Author Affiliations
Thomas R. Nelson Jr., Air Force Research Lab. (United States)
John P. Loehr, Air Force Research Lab. (United States)
Qianghua Xie, Air Force Research Lab. (United States)
James E. Ehret, Air Force Research Lab. (United States)
Joseph E. Van Nostrand, Air Force Research Lab. (United States)
Lisa Gamble, Univ. of Alabama in Huntsville (United States)
Darryl K. Jones, Univ. of Alabama in Huntsville (United States)
Spencer T. Cole, Univ. of Alabama in Huntsville (United States)
Rebecca H. Trimm, Univ. of Alabama in Huntsville (United States)
William M. Diffey, Air Force Research Lab. (United States)
Richard Lynn Fork, Univ. of Alabama in Huntsville (United States)
Andrew S. Keys, NASA Marshall Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 3714:
Enabling Photonic Technologies for Aerospace Applications
Andrew R. Pirich; Edward W. Taylor, Editor(s)

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