Optical Sciences

Biomolecules and nanostructures

The Optical Sciences group studies the interaction of light and matter. Our current focus is on detection and sensing/imaging with an emphasis on the development of integrated photonics. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.


Holographic injection locking of a broad area laser diode via a photorefractive thin-film device

(full pdf)

P. D. van Voorst, M.R. de Wit, H. L. Offerhaus, S. Tay, J. Thomas, N. Peyghambarian and K.-J. Boller
Optics Express
Vol. 15, No. 26 p17587-17591 dec 24 2007

We demonstrate locking of a high power broad area laser diode to a single frequency using holographic feedback from a photorefractive polymer thin-film device for the first time. A four-wave mixing setup is used to generate feedback for the broad area diode at the wavelength of the single frequency source (Ti:Sapphire laser) while the spatial distribution adapts to the preferred profile of the broad area diode. The result is an injection-locked broad area diode emitting with a linewidth comparable to the Ti:Sapphire laser.
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