Optical Sciences

Biomolecules and nanostructures

The Optical Sciences group studies the interaction of light and matter at the nanoscale. We do this by exploring ways to shape light and its environment. It's what we call active and passive control. Our current focus is on the interaction of light with biomolecules and nanostructures. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.
We participate in the EU-COST actions MP1102: Coherent Raman microscopy (MicroCor) and CM1202: Supramolecular photocatalytic water splitting (PERSPECT-H2O)


Wide wavelength-tuning of a double-clad Yb3+-doped fiber laser based on a fiber Bragg grating array

(full pdf)

J.A. Alvarez-Chavez, A. Martínez-Rios, I. Torres-Gomez, H.L. Offerhaus
Laser Physics Letters
vol 4 july 6 2007

We report wide wavelength tuning in a double-clad ytterbium-doped fiber laser. The laser cavity consists of an array of broadband high-reflection fiber Bragg gratings and a bulk grating as output coupler and wavelength selection element. The proposed fiber laser configuration combines low intra-cavity loss of fiber Bragg grating mirrors with wide wavelength tuning of bulk gratings.We demonstrate >70 nm wavelength tuning range, limited only by the available fiber Bragg gratings.
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