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Proceedings Paper

Detection of lateral spontaneous emission for VCSEL monitoring
Author(s): Charlotte Bringer; Veronique Bardinal; Emmanuelle Daran; Thierry Camps; Yann G. Boucher; Guilhem Almuneau; Olivier Gauthier-Lafaye; Pascal Dubreuil; Jean-Baptiste Doucet; Chantal Fontaine
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Paper Abstract

VCSELs (Vertical Cavity Surface Emitting Lasers) are nowadays more and more exploited in optoelectronic applications, monitoring their lasing power in a compact and low cost manner becomes crucial. To collect and control the output light, an external photodetector associated with an optical microlens array can be used. Integrated solutions based on the use of a bulk or QW photodetection section added in single-or double-cavity structures have also been proposed. Here, we have investigated a simpler solution based on a standard VCSEL array. Light emitted by a VCSEL has been electrically detected by adjacent VCSELs located in the same array, using in plane optical waveguiding of spontaneous emission in the intrinsic central zone of the devices. We show that the detected photocurrent can be related to the power of the emitting VCSEL. Signal intensity has been studied as a function of VCSELs distance. This method could lead to a more efficient way to monitor VCSEL emission.

Paper Details

Date Published: 8 September 2004
PDF: 8 pages
Proc. SPIE 5453, Micro-Optics, VCSELs, and Photonic Interconnects, (8 September 2004); doi: 10.1117/12.545568
Show Author Affiliations
Charlotte Bringer, LAAS, CNRS (France)
Veronique Bardinal, LAAS, CNRS (France)
Emmanuelle Daran, LAAS, CNRS (France)
Thierry Camps, LAAS, CNRS (France)
Yann G. Boucher, Ecole Nationale d'Ingenieurs de Brest, RESO (France)
Guilhem Almuneau, LAAS, CNRS (France)
Olivier Gauthier-Lafaye, LAAS, CNRS (France)
Pascal Dubreuil, LAAS, CNRS (France)
Jean-Baptiste Doucet, LAAS, CNRS (France)
Chantal Fontaine, LAAS, CNRS (France)

Published in SPIE Proceedings Vol. 5453:
Micro-Optics, VCSELs, and Photonic Interconnects
Hugo Thienpont; Kent D. Choquette; Mohammad R. Taghizadeh, Editor(s)

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