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Opt Lett. 2011 Feb 15;36(4):436-8. doi: 10.1364/OL.36.000436.

Widely tunable monolithic narrowband grating filter for near-infrared radiation.

Author information

1
Institut für Angewandte Physik, Friedrich-Schiller-Universität Jena, Jena, Germany. frank.brueckner@uni‑jena.de

Abstract

We propose a monolithic narrowband guided-mode grating filter in fused silica that is widely tunable in the near-IR wavelength region. Based on a recently demonstrated approach for a monolithic reflector comprising an encapsulated grating, we theoretically investigate such a device by means of rigorous modeling aimed at a narrow linewidth. It is demonstrated that upon a spatial variation of the filter's grating period its resonance wavelength can be tuned in a remarkably wide range of near-IR radiation with 800 nm<λ(res)< 1600 nm by translating the laser beam relative to the grating area. The filter performance in terms of linewidth and contrast is essentially preserved over the entire tuning interval.

PMID:
21326414

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