Results 21 to 30 of about 626 (184)
, 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.
Daniele Melati (5540327) +7 more
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IEEE Photonics Journal, 2012 We design a spot-size converter (SSC) on silicon-on-insulator (SOI) platform to interface an integrated optical receiver (IOR) with a single-mode fiber (SMF).
Neil Na, Tao Yin
doaj +1 more source
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
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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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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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Novel fold-back 1×20 100 GHz mux/demux planar Echelle grating for low loss photonic switches
, 2022 We design and investigate a novel photonic integrated four-use fold-back 20 channels 100GHz spacing Echelle grating multiplexer/demultiplexer. Results show <2.5dB insertion loss, <-45dB cross-talk, and fabrication tolerance of 0.3 pm rounding comer
Wang, Yu, Calabretta, Nicola
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The Use of Echelle Gratings in Ultraviolet Space Astronomy [PDF]
Symposium - International Astronomical Union, 1971 The echelle diffraction grating can be used to provide high spectral resolution in compact instrumentation which is very suitable for space astronomy applications. Spectrographs in which the high dispersion of the echelle is crossed with that of a concave grating have been flown in ‘Skylark’ sounding rockets to record the solar spectrum in the ...
B. C. Boland +3 more
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Geological processes shaping freshwater biodiversity: a synthesis of global evidence
Biological Reviews, Volume 101, Issue 3, Page 1568-1581, June 2026.ABSTRACT Recent genomic data highlight the key roles of geological processes in shaping the diversification and biogeography of freshwater lineages. Specifically, physical processes such as tectonic uplift, erosion, glaciation, lake formation, and sea‐level fluctuation contribute extensively to the evolution of biotic diversity within and among ...
Jonathan M. Waters +3 more
wiley +1 more source
Ecology and Evolution, Volume 16, Issue 6, June 2026.Pleistocene glaciations have shaped freshwater fish evolution and distribution patterns across North America. This study investigated the phylogeographical history of the Western Blacknose Dace (Rhinichthys obtusus) using mitochondrial genomic data, revealing three major clades that diverged 2–1.5 million years ago during Pleistocene glaciations when ...
Adelina Rodriguez +7 more
wiley +1 more source