Mid-IR distributed feedback interband cascade lasers and their application for detection of CH4
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semiconductor superlattices↗
Engineering topics
Muller, R. E.
Publications and source records attributed to Muller, R. E..
Mid-IR interband cascade lasers for chemical sensing
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diode lasers↗
Progress in semiconductor reference oscillator development for coherent detection optical remote sensing
High power 2.05-mu m Fabry-Perot and distributed feedback (DFB) ridge waveguide lasers fabricated from epitaxially grown InGaAsSb/AlGaAsSb/GaSb and InGaAs/InP hetero-structures are reported.
coherent lidar DFB semiconductor lasers tunable re↗
Progress in semiconductor reference oscillator development for coherent detection optical remote sensing
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semiconductor lasers distributed feedback lasers o↗
Diffractive optics for particle velocimetry and sizing
Beam-shaping diffractive optical elements are used to create structured light patterns in fluid flows. Particle scattering results in detected signals that can be used to determine the particle size and velocity.
diffractive optics laser velocimetry↗
Stitching-error reduction in gratings by shot-shifted electron-beam lithography
Calculations of the grating spatial-frequency spectrum and the filtering properties of multiple-pass electron-beam writing demonstrate a tradeoff between stitching-error suppression and minimum pitch separation. High-resolution measurements of optical-diffraction patterns show a 25-dB reduction in stitching-error side modes.
Integrated optics semiconductor lasersgratings↗
Tunable narrowband semiconductor reference oscillator technology for coherent detection lidar
The coherent Doppler lidar approach for acquiring global profilometry of tropospheric winds from Earth orbit is reliant on off-nadir beam scanning geometry for retrieval of vector winds by Doppler analysis of laser radiation backscattered by entrained aerosols and cloud particles.
semiconductor lasers coherent lidar↗
Tunable narrowband semiconductor reference oscillator technology for coherent detection lidar
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semiconductor lasers coherent lidar↗
Design of multi-bandwidth frequency selective surfaces for near infrared filtering
Frequency selective surfaces are widely used in the microwave and millimeter wave regions of the spectrum for filtering signals. They are used in telecommunication systems for multi-frequency operation or in instrument detectors for spectroscopy.
frequency↗
Quantum Well Infrared Photodetector (QWIP) Focal Planes for Long Wave Imaging
In this paper, we discuss the development of very sensitive long wavelength infrared GaAs/AlxGa1-xAs quantum well infrared photodetectors (QWIPs) based on bound-to-quasibound intersubband transition, fabrication of light coupling schemes for efficient light coupling, and demonstration of several long wavelength infrared cameras based on QWIP focal plane arrays.
long wavelength infrared quantum well infrared pho↗
New Convex Grating Types for Concentric Imaging Spectrometers
The properties of convex gratings fabricated by electron-beam lithography are investigated. Three grating types are shown. These gratings allow the optical designer to fully realize the considerable advantages of concentric spectrometer forms.
spectrometers concentric imaging electron beam↗
Long-Wavelength 640 x 486 GaAs/AlGaAs Quantum Well Infrared Photodetector Snap-shot Camera
The performcance of this QWIP camera is reported including indoor and outdoor imaging.
long-wavelength↗
9 Micron Cutoff 640 x 486 GaAs/A1xGa1-xAs Quantum Well Infrared Photodetector Snap-shot Camera
The performance of this QWIP camera is reported including indoor and outdoor imaging.
noise equivalent differential temperature test str↗
Reconstructions of Computed-Tomography Imaging Spectrometer Image Cubes Using Calculated System Matrices
The computed-tomography imaging spectrometer (CTIS) captures a scene's spatial and spectral information without any type of scanning.
experimental↗
Demonstration of First 9 Micron cutoff 640 x 486 GaAs Based Quantum Well Infrared PhotoDetector (QWIP) Snap-Shot Camera
In this paper, we discuss the development of this very sensitive long waelength infrared (LWIR) camera based on a GaAs/AlGaAs QWIP focal plane array (FPA) and its performance in quantum efficiency, NEAT, uniformity, and operability.
arsenide (GaAs) quantum well infrared photodetecto↗
Long-wavelength 256x256 QWIP Hand-held Camera
In this paper, we discuss the development of very sensitive long wavelength infrared (LWIR) GaAs/AlxGa1-xAs quantum well infrared photodetectors (QWIPs), fabrication of random reflectors for efficient light coupling, and the demonstration of first hand-held long-wavelength 256x256 QWIP focal plane array camera. Excellent imagery, with a noise equivalent differential temperature of 25 mK has been achieved.
long↗
Long Wavelength Quantum Well Infrared Photodetector (QWIP) Research at Jet Propulsion Laboratory
One of the simplest device realizations of the classic particle-in-the-box problem of basic quantum mechanics is the Quantum Well Infrared Photodetector (QWIP). Optimization of the detector design and material growth and processing has culminated in the realization of a 15 ??utoff 128x128 focal plane array camera and a camera with large (256x256 pixel) focal plane array of QWIPs which can see at 8.5 ??holding forth great promise for a variety of applications in the 6-25 ??avelength range. This paper discusses the physics of the QWIP and QWIP technology development at Jet Propulsion Laboratory
QWIP↗
Long-Wavelength 256 x 256 QWIP Hand-Held Camera
In this paper, we discuss the development of very sensitive long wavelength infrared (LWIR) GaAs/Al(x)Ga(l-x)As quantum well infrared photodetectors (QWIPs), fabrication of random reflectors for efficient light coupling, and the demonstration of the first hand-held long-wavelength 256 x 256 QWIP focal plane array camera. Excellent imagery, with a noise equivalent differential temperature (NE Delta T) of 25 mK has been achieved.
Gunapala, S. D.↗