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Title: Electroabsorption optical modulator

Abstract

An electroabsorption modulator incorporates waveguiding regions along the length of the modulator that include quantum wells where at least two of the regions have quantum wells with different bandgaps. In one embodiment of the invention, the regions are arranged such that the quantum wells have bandgaps with decreasing bandgap energy along the length of the modulator from the modulator's input to its output. The bandgap energy of the quantum wells may be decreased in discrete steps or continuously. Advantageously, such an arrangement better distributes the optical absorption as well as the carrier density along the length of the modulator. Further advantageously, the modulator may handle increased optical power as compared with prior art modulators of similar dimensions, which allows for improved link gain when the optical modulator is used in an analog optical communication link.

Inventors:
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1410278
Patent Number(s):
9,823,497
Application Number:
15/095,516
Assignee:
National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM) SNL-A
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Patent File Date: 2016 Apr 11
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 47 OTHER INSTRUMENTATION

Citation Formats

Skogen, Erik J. Electroabsorption optical modulator. United States: N. p., 2017. Web.
Skogen, Erik J. Electroabsorption optical modulator. United States.
Skogen, Erik J. Tue . "Electroabsorption optical modulator". United States. doi:. https://www.osti.gov/servlets/purl/1410278.
@article{osti_1410278,
title = {Electroabsorption optical modulator},
author = {Skogen, Erik J.},
abstractNote = {An electroabsorption modulator incorporates waveguiding regions along the length of the modulator that include quantum wells where at least two of the regions have quantum wells with different bandgaps. In one embodiment of the invention, the regions are arranged such that the quantum wells have bandgaps with decreasing bandgap energy along the length of the modulator from the modulator's input to its output. The bandgap energy of the quantum wells may be decreased in discrete steps or continuously. Advantageously, such an arrangement better distributes the optical absorption as well as the carrier density along the length of the modulator. Further advantageously, the modulator may handle increased optical power as compared with prior art modulators of similar dimensions, which allows for improved link gain when the optical modulator is used in an analog optical communication link.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 21 00:00:00 EST 2017},
month = {Tue Nov 21 00:00:00 EST 2017}
}

Patent:

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Works referenced in this record:

40-Gb/s Widely Tunable Transceivers
journal, January 2007

  • Raring, James W.; Coldren, Larry A.
  • IEEE Journal of Selected Topics in Quantum Electronics, Vol. 13, Issue 1, p. 3-14
  • DOI: 10.1109/JSTQE.2006.885329

Monolithically integrated active components: a quantum-well intermixing approach
journal, March 2005

  • Skogen, E. J.; Raring, J. W.; Morrison, G. B.
  • IEEE Journal of Selected Topics in Quantum Electronics, Vol. 11, Issue 2, p. 343-355
  • DOI: 10.1109/JSTQE.2005.846525