Title: Compact spectrometer system based on a gradient grating period guided-mode resonance filter
Authors: Lin, Hsin-An
Hsu, Hsin-Yun
Chang, Chih-Wei
Huang, Cheng-Sheng
Department of Mechanical Engineering
Issue Date: 16-May-2016
Abstract: We demonstrate a compact spectrometer system by using a gradient grating period guided-mode resonance filter-mounted on a linear photodetector array-that exhibits spatially dependent resonance characteristics; a specific incident wavelength is reflected such that the underlying array pixels measure minimum intensity. A precalibrated transmission efficiency matrix is used to determine each pixel\'s transmission efficiency for specific wavelengths. Unknown spectral information can be calculated from the measured intensity. Grating periods of 250-388 nm in 2-nm increments are used in each 100-cycle period. Device length is 2.23 mm. Spectral range of 506-700 nm is measurable with 1-nm resolution. (C) 2016 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.24.010972
ISSN: 1094-4087
DOI: 10.1364/OE.24.010972
Volume: 24
Issue: 10
Appears in Collections:Articles