Spotted Custom Lenses to Tailor the Divergence of Vertical-Cavity Surface-Emitting Lasers

Abstract : We demonstrate the output beam collimation of GaAs-based vertical-cavity surface-emitting lasers by means of self-aligned polymer microlenses deposited on SU-8 pedestals using a cantilever-based spotter. We show that this fabrication technique ensures a reproducible lens shape because the contact angle and the deposited volume are constant for a given surface. Device properties are presented and compared to optical beam propagation modeling results. We demonstrate that the final beam divergence is only controlled by pedestal design parameters and can be reduced with this method by a factor 10 (to 1.2° for single-mode devices) with no significant lasing performance modification.
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https://hal.archives-ouvertes.fr/hal-00589356
Contributor : Christophe Levallois <>
Submitted on : Thursday, April 28, 2011 - 5:02:20 PM
Last modification on : Saturday, January 11, 2020 - 1:16:05 AM

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Véronique Bardinal, Benjamin Reig, Thierry Camps, Christophe Levallois, Emmanuelle Daran, et al.. Spotted Custom Lenses to Tailor the Divergence of Vertical-Cavity Surface-Emitting Lasers. IEEE Photonics Technology Letters, Institute of Electrical and Electronics Engineers, 2010, 22 (21), pp.1592 - 1594. ⟨10.1109/LPT.2010.2071861⟩. ⟨hal-00589356⟩

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