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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 23, Iss. 7 — Jul. 1, 2005
  • pp: 2318–

Comparison of Simulation and Measurement of Dynamic Fiber-Coupling Effects for High-Speed Multimode VCSELs

Gion Sialm, Daniel Lenz, Daniel Erni, Gian-Luca Bona, Christian Kromer, Marc Xavier Jungo, Thomas Morf, Frank Ellinger, and Heinz Jckel

Journal of Lightwave Technology, Vol. 23, Issue 7, pp. 2318- (2005)


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Abstract

Static and dynamic measurements are performed with GaAs oxide-confined vertical-cavity surface-emitting lasers (VCSELs), using multimode fibers with a core diameter of 50 and 62.5 m and different numerical apertures (NAs). They show that a small NA can have a severe impact on the eye opening and thus also on the bit-error rate. The measurements are analyzed with a spatiotemporal two-dimensional (2-D) multimode VCSEL model. The required parameter extraction for the model is verified with small-and large-signal measurements. The analysis shows that the change of the eye opening can be explained by the interaction between the mode-and the current-injection profile, carrier diffusion, and intermodal gain compression (IGC). IGC increases differences in the modal power distribution caused by the interaction between the mode profiles and the current-injection profile. Carrier diffusion is able to compensate these increased differences of the modal power distribution. Its impact, however, on dynamic changes caused by IGC is moderate.

© 2005 IEEE

Citation
Gion Sialm, Daniel Lenz, Daniel Erni, Gian-Luca Bona, Christian Kromer, Marc Xavier Jungo, Thomas Morf, Frank Ellinger, and Heinz Jckel, "Comparison of Simulation and Measurement of Dynamic Fiber-Coupling Effects for High-Speed Multimode VCSELs," J. Lightwave Technol. 23, 2318- (2005)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-23-7-2318

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