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Opt Lett. 1985 Jun 1;10(6):291-3.

Grating-fiber coupler as a high-resolution spectrometer.

Abstract

An in-line, single-mode fiber-optic spectrometer is described and analyzed. Its key element is a photoresist grating placed in the evanescent field near the core on a side-polished fiber. Fabrication and nearly diffraction-limited performance (resolution Deltalambda asymptotically equal to 1 nm) are reported, and means are proposed to increase the resolution by several orders of magnitude.

PMID:
19724424
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