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Proceedings Paper

Progress and issues for high-speed vertical cavity surface emitting lasers
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Paper Abstract

Extrinsic electrical, thermal, and optical issues rather than intrinsic factors currently constrain the maximum bandwidth of directly modulated vertical cavity surface emitting lasers (VCSELs). Intrinsic limits based on resonance frequency, damping, and K-factor analysis are summarized. Previous reports are used to compare parasitic circuit values and electrical 3dB bandwidths and thermal resistances. A correlation between multimode operation and junction heating with bandwidth saturation is presented. The extrinsic factors motivate modified bottom-emitting structures with no electrical pads, small mesas, copper plated heatsinks, and uniform current injection. Selected results on high speed quantum well and quantum dot VCSELs at 850 nm, 980 nm, and 1070 nm are reviewed including small-signal 3dB frequencies up to 21.5 GHz and bit rates up to 30 Gb/s.

Paper Details

Date Published: 26 February 2007
PDF: 12 pages
Proc. SPIE 6484, Vertical-Cavity Surface-Emitting Lasers XI, 64840J (26 February 2007); doi: 10.1117/12.715081
Show Author Affiliations
Kevin L. Lear, Colorado State Univ. (United States)
Ahmad N. Al-Omari, Yarmouk Univ. (Jordan)

Published in SPIE Proceedings Vol. 6484:
Vertical-Cavity Surface-Emitting Lasers XI
Kent D. Choquette; James K. Guenter, Editor(s)

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