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Proceedings Paper

VCSELs as light source for time-of-flight sensors
Author(s): Holger Moench; Manuel Frey; Martin Grabherr; Stephan Gronenborn; Ralph Gudde; Johanna Kolb; Michael Miller; Alexander Weigl
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Paper Abstract

VCSELs and VCSEL arrays are an ideal light source for time-of-flight based sensors. The narrow emission spectrum and the ability for short pulses make them superior to LEDs. Combined with fast photodiodes or special camera chips spatial 3D information can be obtained which is needed in diverse applications like camera autofocus, indoor navigation, 3Dobject recognition or even autonomously driving vehicles. VCSEL arrays are the way to tailor the output power. For pulse operation at low duty cycle average heat dissipation is no longer the upper limit to the operating point of VCSELs but over-pulsing becomes possible. Taking into account electrical boundary conditions and optimum conversion efficiency arrays can be designed for specific operating conditions. Measurements of arrays under short pulse operation are presented using a package with integrated driver.

Paper Details

Date Published: 25 February 2017
PDF: 7 pages
Proc. SPIE 10122, Vertical-Cavity Surface-Emitting Lasers XXI, 1012204 (25 February 2017); doi: 10.1117/12.2249053
Show Author Affiliations
Holger Moench, Philips GmbH Photonics Aachen (Germany)
Manuel Frey, Philips GmbH U-L-M Photonics (Germany)
Martin Grabherr, Philips GmbH U-L-M Photonics (Germany)
Stephan Gronenborn, Philips GmbH Photonics Aachen (Germany)
Ralph Gudde, Philips Photonics Modules (Netherlands)
Johanna Kolb, Philips GmbH Photonics Aachen (Germany)
Michael Miller, Philips GmbH U-L-M Photonics (Germany)
Alexander Weigl, Philips GmbH U-L-M Photonics (Germany)

Published in SPIE Proceedings Vol. 10122:
Vertical-Cavity Surface-Emitting Lasers XXI
Kent D. Choquette; Chun Lei, Editor(s)

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