Results 141 to 150 of about 5,753 (177)

Large-ruled monolithic echelle gratings

SPIE Proceedings, 2000
This paper will present test and performance data on the two largest monolithic, echelle gratings ever ruled. These cryogenically cooled gratings were manufactured by Hyperfine, Inc. and were developed for the Stratospheric Observatory For Infrared Astronomy (SOFIA).
Kirk G. Bach, Bernhard W. Bach, Jr.
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Compact echelle spectrometer employing a cross-grating

Applied Optics, 2018
The concept and the implementation of a compact and simplified echelle spectrometer are presented, and the working principle is demonstrated by first experimental measurements. The crucial element of the setup is a cross-grating, combining an echelle grating utilizing several higher diffraction orders (5th up to 11th) and a superposed perpendicular ...
Daniel, Thomae, Tobias, Hönle, Matthias, Kraus, Verena, Bagusat, Arnaud, Deparnay, Robert, Brüning, Robert, Brunner   +6 more
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Echelle gratings acting as one

Applied Optics, 2003
A new device for producing order-sortable echelle spectra by use of consecutive diffactions in several echelle grating surfaces is described. This echelle emulating device (EED) comprises a prism placed in the path between a pair of echelle grating surfaces. The refractive angle of the prism is fixed through a simple relation. The device reproduces all
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Echelle gratings for the near-infrared

SPIE Proceedings, 2012
We report on echelle gratings produced by diamond turning with groove spacings coarser than 20 lines per mm. Increasing the groove spacing of an echelle reduces the free spectral range allowing infrared orders to be matched to the detector size. Reflection echelle gratings designed for the near-infrared have potential wide application in both ambient ...
Kenneth H. Hinkle, Richard R. Joyce, Bernhard W. Bach, Erich Bach, Kirk G. Bach, Brooke M. Beam, Gary Poczulp, Verne V. Smith, Lloyd Wallace   +8 more
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Compact Echelle Grating Filter for Monolithic Silicon Photonics

CLEO 2023, 2023
We present a miniaturized Echelle grating multiplexer in the O-band. The device was fabricated using GlobalFoundries-45CLO-process. Statistical analysis verifies the device manufacturability with a stable channel-center (standard deviation< 0.72nm), and crosstalk (<-20dB over 3dB-bandwidth).
Ahmed Abumazwed, Sujith Chandran, Yusheng Bian, Won Suk Lee, Jessica Zhang, Dan Deptuck, Michal Rakowski, Andy Stricker, Jae Gon Lee, Ted Letavic   +9 more
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The fabrication of the holographic echelle gratings

SPIE Proceedings, 2015
The echelle gratings with the ultra-high resolution are one of the key elements in spectroscopy, optical communications and other fields. Currently, the diamond ruling and the wet etching technique are two primary methods to fabricate echelle gratings. In this paper, we have adopted a new method of the echelle gratings fabrication.
Quan Liu, Fei Gao, Yang Zhou, Jianhong Wu   +3 more
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An echelle diffraction grating for imaging spectrometer

SPIE Proceedings, 2016
We demonstrate an echelle diffraction grating (EDG) of 17 input waveguides and 33 output waveguides. For each input waveguide, only 17 of 33 output waveguides are used, receiving light ranging from 1520 nm to 1600 nm wavelength. The channel spacing of the EDG is 5 nm, with loss of -6dB and crosstalk of -17dB for center input waveguide and -15dB for ...
Minyue Yang, Han Wang, Mingyu Li, Jian-Jun He   +3 more
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Echelle volume binary grating: a step forward

SPIE Proceedings, 2012
The possibility of making Volume Binary Gratings to be used in high dispersion instrumentations (echelle) is considered. The idea is to study volume gratings with a binary refractive index profile and to optimize it in terms of refractive index modulation, duty cycle, grating thickness keeping in mind the possible limitations in the realization step.
BIANCO, ANDREA, N. Ebizuka
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Fabrication and testing of chemically micromachined silicon echelle gratings

Applied Optics, 2000
We have fabricated large, coarsely ruled, echelle patterns on silicon wafers by using photolithography and chemical-etching techniques. The grating patterns consist of 142-microm-wide, V-shaped grooves with an opening angle of 70.6 degrees, blazed at 54.7 degrees.
L D, Keller, D T, Jaffe, O A, Ershov, T, Benedict, U U, Graf   +4 more
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Echelle volume phase holographic gratings: experimental results

SPIE Proceedings, 2014
The develop of Volume Phase Holographic Gratings (VPHGs) working as echelle grating is reported based on binary structures. A mask lithography process was developed to produce the patterns on SU8 photoresist. The binary pattern with 50 l/mm were regular and defect free.
Andrea Bianco, Lorenzo Caranzi, Mario Caironi   +2 more
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