Polarization-insensitive optical amplifiers in A1InGaAs

Prakash Koonath, Sangin Kim, Woon Jo Cho, Anand Gopinath

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


In this letter, we report the theoretical modeling and the fabrication of polarization-insensitive optical amplifiers at 1300 nm in AlInGaAs-InP material system. Gain calculations, using the k.p method, show that the introduction of 0.33% tensile strain into a three-quantum-well structure can achieve gain-matching over a wide energy spectrum. The amplifiers, fabricated and tested, show excellent polarization insensitivity (less than 0.3 dB) at 1280 nm with a gain of 11 dB at 150 mA. Gain-bandwidth needs to be improved by employing antireflection coatings to suppress the facet reflectivity.

Original languageEnglish (US)
Pages (from-to)779-781
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number8
StatePublished - Aug 2001

Bibliographical note

Funding Information:
Manuscript received November 27, 2000; revised April 23, 2001. This work was supported by the Defense Advanced Research Projects Agency and by the Air Force Office of Scientific Research. P. Koonath and A. Gopinath are with the Department of Electrical Computer Engineering, University of Minnesota, Minneapolis, MN 55455 USA (e-mail: [email protected] and [email protected]). S. Kim is with the Korea Telecom, Access Network Research Laboratory, 305–348 Taejon, Korea (e-mail: [email protected]). W.-J. Cho is with the Photonics Research Center, Korea Institute of Science and Technology, Seoul 136-791, Korea (e-mail: [email protected]). Publisher Item Identifier S 1041-1135(01)06438-2.


  • Integrated optics
  • Polarization
  • Quantum wells
  • Semiconductor optical amplifier
  • Tensile strain


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