Propagation of spatially partially coherent emission from a vertical-cavity surface-emitting laser

Michael Peeters, Guy Verschaffelt, Johan Speybrouck, Hugo Thienpont, Jan Danckaert, J. Turunen, P. Vahimaa

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

A strong reduction of spatial coherence of the emission of large aperture vertical-cavity surfaceemitting
lasers occurs when they are driven by microsecond electrical pulses [1]. In this letter
we study the influence of this partial spatial coherence on the propagation characteristics. The
spatial decoherence manifests itself in the formation of a Gaussian far field intensity distribution.
We measure the transverse pulse profile from near to far field and see that the shape-invariant far
field regime starts after 140 micrometer in the pulsed regime as opposed to several centimeters
in continuous wave. This matches quantitatively with calculations using a full partially coherent
propagation model without any free fitting parameters.
Original languageEnglish
Pages (from-to)1178-1180
Number of pages3
JournalOpt. Lett.
Volume31
Publication statusPublished - 2006

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