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Widely tunable monolithic narrowband grating filter for near-infrared radiation

 
: Brückner, F.; Kroker, S.; Friedrich, D.; Kley, E.-B.; Tünnermann, A.

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Optics Letters 36 (2011), Nr.4, S.436-438
ISSN: 0146-9592
Englisch
Zeitschriftenaufsatz
Fraunhofer IOF ()

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 800nm