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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 4 — Feb. 13, 2012
  • pp: 3675–3692

InAs/InP(100) quantum dot waveguide photodetectors for swept-source optical coherence tomography around 1.7 µm

Yuqing Jiao, Bauke W. Tilma, Junji Kotani, Richard Nötzel, Meint K. Smit, Sailing He, and Erwin A. J. M. Bente  »View Author Affiliations

Optics Express, Vol. 20, Issue 4, pp. 3675-3692 (2012)

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In this paper a study of waveguide photodetectors based on InAs/InP(100) quantum dot (QD) active material are presented for the first time. These detectors are fabricated using the layer stack of semiconductor optical amplifiers (SOAs) and are compatible with the active-passive integration technology. We investigated dark current, responsivity as well as spectral response and bandwidth of the detectors. It is demonstrated that the devices meet the requirements for swept-source optical coherent tomography (SS-OCT) around 1.7 μm. A rate equation model for QD-SOAs was modified and applied to the results to understand the dynamics of the devices. The model showed a good match to the measurements in the 1.6 to 1.8 μm wavelength range by fitting only one of the carrier escape rates. An equivalent circuit model was used to determine the capacitances which dominated the electrical bandwidth.

© 2012 OSA

OCIS Codes
(040.5160) Detectors : Photodetectors
(110.4500) Imaging systems : Optical coherence tomography

ToC Category:

Original Manuscript: November 15, 2011
Revised Manuscript: December 20, 2011
Manuscript Accepted: December 23, 2011
Published: January 31, 2012

Virtual Issues
Vol. 7, Iss. 4 Virtual Journal for Biomedical Optics

Yuqing Jiao, Bauke W. Tilma, Junji Kotani, Richard Nötzel, Meint K. Smit, Sailing He, and Erwin A. J. M. Bente, "InAs/InP(100) quantum dot waveguide photodetectors for swept-source optical coherence tomography around 1.7 µm," Opt. Express 20, 3675-3692 (2012)

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