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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 25 — Sep. 1, 2009
  • pp: F11–F17

High-speed characteristics of vertical cavity surface emitting lasers and resonant-cavity-enhanced photodetectors based on intracavity-contacted structure

Y. M. Song, B. K. Jeong, B. H. Na, K. S. Chang, J. S. Yu, and Y. T. Lee  »View Author Affiliations

Applied Optics, Vol. 48, Issue 25, pp. F11-F17 (2009)

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We fabricated vertical cavity surface emitting lasers (VCSELs) and resonant-cavity-enhanced photodetectors (RCE-PDs) with GaAs/AlGaAs distributed Bragg reflectors (DBRs), operating at λ 980 nm , based on an intracavity-contacted structure. The top-DBR mesa diameter of the VCSELs was optimized to 18 μm in terms of slope efficiency, differential series resistance, and 3 dB bandwidth. For VCSELs with an oxide aperture of 4.5 μm and a top-DBR mesa diameter of 18 μm , the threshold current was about 1.2 mA , exhibiting maximum output power of 3.49 mW (at 20 ° C ) with good uniformity. The effect of the overetching in the outermost layer of RCE-PDs on the device performance was also investigated. For RCE-PDs based on the VCSEL structure, a peak responsivity of 0.44 A/W (at λ 979.7 nm ) with a spectral width of 3 nm and a dark current of 68 pA under a bias voltage of 5 V at 20 ° C was obtained. The maximum 3 dB bandwidths of 11.5 GHz with a modulation current efficiency factor of 5.6 GHz / mA 1 / 2 at 7 mA and 9 GHz at 7 V were achieved for VCSELs and RCE-PDs, respectively.

© 2009 Optical Society of America

OCIS Codes
(040.5160) Detectors : Photodetectors
(200.4650) Optics in computing : Optical interconnects
(140.7260) Lasers and laser optics : Vertical cavity surface emitting lasers

ToC Category:
High Speed Compontents and Optical Communications

Original Manuscript: February 2, 2009
Revised Manuscript: May 1, 2009
Manuscript Accepted: May 8, 2009
Published: May 29, 2009

Y. M. Song, B. K. Jeong, B. H. Na, K. S. Chang, J. S. Yu, and Y. T. Lee, "High-speed characteristics of vertical cavity surface emitting lasers and resonant-cavity-enhanced photodetectors based on intracavity-contacted structure," Appl. Opt. 48, F11-F17 (2009)

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