Echelle grating silicon multi/demultiplexers with single-reflection total internal reflectors

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Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
12:08

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Published on: July 18, 2015

Sahnggi Park1, Sang-Gi Kim, Jeagyu Park

  • 1Electronics and Telecommunications Research Institute, 161 Gajong-dong, Yusong-gu, Daejeon, 305-350, South Korea. sahnggi@etri.re.kr

Optics Express
|November 29, 2012
PubMed

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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...