Influence of the spatial pump distribution on the performance of high power vertical-external-cavity surface-emitting lasers

A. Chernikov, J. Herrmann, M. Scheller, M. Koch, B. Kunert, W. Stolz, S. Chatterjee, S. W. Koch, T. L. Wang, Y. Kaneda, J. M. Yarborough, J. Hader, J. V. Moloney

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Abstract

The performance of a 1040 nm vertical-external-cavity surface-emitting laser is studied as function of the size and shape of the pumped area. The input-output characteristics of the device are monitored while simultaneously tracking the temperature in the active region. It is shown that the pump spot shape plays a crucial role in optimizing the laser output. Improvements up to a factor of 5 are found for a super-Gaussian in comparison to the standard Gaussian shape. For the large pump-spot sizes needed for high output powers, it turns out that the power-scalability breaks down due to the suppressed lateral heat flow.

Original languageEnglish (US)
Article number191110
JournalApplied Physics Letters
Volume97
Issue number19
DOIs
StatePublished - Nov 8 2010

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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