Results 11 to 20 of about 626 (184)
Optics Express, 2022 We present a comparative experimental study of three silicon photonic echelle grating demultiplexers that are integrated with a Mach-Zehnder interferometer (MZI) launch structure. By appropriate choice of the MZI configuration, the temperature induced shift of the demultiplexer channel wavelengths can be suppressed (athermal) or enhanced (super-thermal)
Melati, Daniele +7 more
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Grating monochromator wavelength calibration using an echelle grating wavelength meter [PDF]
Optics Express, 2019 Monochromators are a common utility for the spectral calibration of spectrometers. To guarantee traceability of characterization measurements to SI-standards, monochromators used as secondary standards must be properly calibrated. Common calibration procedures are based on the measurement of spectral lines emitted by gas-discharge lamps or lasers.
Baumgartner, Andreas
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Optical Design for Aberration Correction of Ultra-Wide Spectral Range Echelle Spectrometer
Photonics, 2022 The echelle grating spectrometer, with a wide spectral range and high-resolution spectral analysis, is one of the best tools for fine spectral measurement. Nevertheless, it suffers from excessive residual aberrations and a large overall size.
Yuming Wang +3 more
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Echelle grating with improved polarization characteristics used for Earth observation
, 2022 Paper 114511D, 9 S.An Echelle-grating specifically developed for the space borne measurement of earth's atmospheric CO2 concentration is presented. It has a line density of ∼170L/mm and is manufactured on a thick crystalline silicon substrate using
Sadlowski, S. +6 more
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Compact double-pass Echelle spectrometer employing a crossed diffraction grating
, 2022 This contribution presents the design and implementation of a compact and robust Echelle-inspired cross-grating spectrometer which is arranged as a double pass setup.
Patrick Sadlowski +19 more
core +1 more source
Reflectively Coupled Waveguide Photodetector for High Speed Optical Interconnection
Sensors, 2010 To fully utilize GaAs high drift mobility, techniques to monolithically integrate In0.53Ga0.47As p-i-n photodetectors with GaAs based optical waveguides using total internal reflection coupling are reviewed. Metal coplanar waveguides, deposited on top of
Shih-Hsiang Hsu
doaj +1 more source
The Planetary Science Journal, 2023 We measured the chemical composition of comet C/2021 A1 (Leonard) using the long-slit echelle grating spectrograph iSHELL/IRTF on 2021 December 20 and on 2022 January 8 and 9.
Sara Faggi +3 more
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Anomalous absorption in TM polarization light by echelle gratings
Optics Express, 2023 Echelle grating plays an essential role in spectral analysis due to its broadband blaze, high dispersion, and high resolution; however, its absorption properties have received no attention. In this paper, we investigate the effect of parameters including incident wavelength, incident angle, and blaze angle on the absorption properties of the Al echelle
Qian, Zhang +3 more
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, 2022 We design and investigate a novel polarization insensitive fold-back 40-channels 100GHz spacing planar Echelle grating multiplexer/demultiplexer. Results show -1.7 dB insertion loss,
Wang, Yu, Calabretta, Nicola
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Silicon Nitride/Silicon Dioxide Echelle Grating Spectrometer for Operation Near 1.55 μm
IEEE Photonics Journal, 2018 Here we use an electron beam lithography system to pattern an ${\rm{S}}{{\rm{i}}_{3}}{{\rm{N}}_{4}}{\rm{/Si}}{{\rm{O}}_{2}}$ echelle grating using silver as a reflector on the grating grooves.
Shengjie Xie +4 more
doaj +1 more source