Results 21 to 30 of about 5,753 (177)
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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Role of the grating profile in Smith-Purcell radiation at high energies
Physical Review Special Topics. Accelerators and Beams, 2005 The passage of a finely focused electron beam near the surface of a periodic metallic grating produces radiation known as Smith-Purcell radiation. This paper presents an analysis of the role of the grating profile in the case of echelle-type gratings ...
J. H. Brownell, G. Doucas
doaj +1 more source
IEEE Photonics Journal, 2013 We demonstrate an integrated spectrometer-on-a-chip composed of an echelle diffraction grating (EDG) and metal-semiconductor-metal (MSM) waveguide photodetector array based on silicon-on-insulator (SOI).
Xiao Ma, Mingyu Li, Jian-Jun He
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Improved Log(gf) Values for Lines of Ti I and Abundance Determinations in the Photospheres of the Sun and Metal-Poor Star HD 84937 (Accurate Transition Probabilities for Ti I) [PDF]
, 2013 New atomic transition probability measurements for 948 lines of Ti I are reported. Branching fractions from Fourier transform spectra and from spectra recorded using a 3 m echelle spectrometer are combined with published radiative lifetimes from laser ...
Cowan, John J. +4 more
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Приборы и методы измерений, 2016 The increase of angular dispersion and slit resolution limit of grating spectrometers by means of variation of grating parameters is limited by its period and allowable order of diffraction. The special solutions (echelle, holographic, immersion gratings)
I. M. Gulis, A. G. Kupreyeu
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IEEE Photonics Journal, 2019 We design a 121-channel on-chip spectrometer based on an echelle grating with densely packed waveguide array on 220-nm silicon-on-insulator platform.
Keqi Ma +4 more
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CHIRON - A Fiber Fed Spectrometer for Precise Radial Velocities
, 2013 The CHIRON optical high-resolution echelle spectrometer was commissioned at the 1.5m telescope at CTIO in 2011. The instrument was designed for high throughput and stability, with the goal of monitoring radial velocities of bright stars with high ...
Bonati, Marco +7 more
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EXOhSPEC folded design optimization and performance estimation [PDF]
, 2019 The EXOplanet high resolution SPECtrograph (EXOhSPEC) instrument is an echelle spectrograph dedicated to the detection of exoplanets by using the radial velocity method using 2m class telescopes.
Buisset, Christophe +4 more
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Demonstration of a Near-IR Laser Comb for Precision Radial Velocity Measurements in Astronomy [PDF]
, 2015 We describe a successful effort to produce a laser comb around 1.55 $\mu$m in the astronomical H band using a method based on a line-referenced, electro-optical-modulation frequency comb.
C. Beichman +17 more
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Cooled echelle grating spectrometer [PDF]
, 1980 A cooled echelle grating spectrometer for detecting wavelengths between one micron and fifteen microns is disclosed. More specifically, the spectrometer has a cross-dispersing grating for ordering infrared energy and an echelle grating for further ...
Beer, R.
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