Abstract

Recently, high resolution spectroscopic devices where developed in the millimeter or micrometer size rang. Basically, three type of instruments are available: scanning Fabry-Perot (SFP) interferometer, grating spectrometer (GS), and array waveguide grating devices (AWG). The spectral resolution (R=λ/Δλ) of GS type of devices is limited to R ≤ 100 at present¹. The width of the passband of AWG’s and SFP’s can be as high as Δν ~ 1GHz that corresponds to R ~ 10⁵. In this paper we show that a comparable spectral resolution can be achieved using an array of spherical or nearly spherical dielectric microresonators arranged on a flat light guide.

© 2007 IEEE