Design of a miniature solid state NIR spectrometer

Zhang, Hanyi; Wang, XiaoLu L.; Soos, Jolanta; Crisp, J. A.

doi:10.1117/12.211276

Cited by 16 publications

(8 citation statements)

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“…A variety of miniaturized, portable spectrometers have been developed for applications where reduced footprint and weight takes precedence over high resolution (2). These micro-spectrometers have typically been inspired by conventional bench-top spectrometers, centering around interferometers or gratings, with miniaturized or integrated optics (3)(4)(5). When minimizing physical dimensions towards submillimeter scales desired in, for example, lab-on-a-chip systems, such designs are inherently limited by adverse effects associated with scaling their optical components or path lengths.…”

Section: Main Textmentioning

confidence: 99%

Single-nanowire spectrometers

Yang

Albrow-Owen

Cui

et al. 2019

Science

388

308

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Spectrometers with ever-smaller footprints are sought after for a wide range of applications in which minimized size and weight are paramount, including emerging in situ characterization techniques. We report on an ultracompact microspectrometer design based on a single compositionally engineered nanowire. This platform is independent of the complex optical components or cavities that tend to constrain further miniaturization of current systems. We show that incident spectra can be computationally reconstructed from the different spectral response functions and measured photocurrents along the length of the nanowire. Our devices are capable of accurate, visible-range monochromatic and broadband light reconstruction, as well as spectral imaging from centimeter-scale focal planes down to lensless, single-cell–scale in situ mapping.

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Section: Main Textmentioning

confidence: 99%

Single-nanowire spectrometers

Yang

Albrow-Owen

Cui

et al. 2019

Science

388

308

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“…There are no moving parts in an AOTF spectrometer, and it can be built as a compact, lightweight, long lifetime, rugged, and reliable device. An AOTF‐based spectrometer for aerospace applications (surface analysis) was developed in JPL [ Zhang et al , 1995]; the same reference reports positive results of the AOTF radiation hardness testing. Existing references to the use of the AOTF technology in space are consolidated by Gupta [1997].…”

Section: Instrument Descriptionmentioning

confidence: 99%

SPICAM IR acousto‐optic spectrometer experiment on Mars Express

et al. 2006

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[1] The SPICAM IR spectrometer on Mars Express mission (1.0-1.7 mm, spectral resolution 0.5-1.2 nm) is dedicated primarily to nadir measurements of H 2 O abundance. It is one of two channels of SPICAM UV-IR instrument. In this spectrometer we applied for the first time in planetary research the technology of an acousto-optic tunable filter (AOTF) that allowed unprecedented mass reduction for such an instrument: 0.75 kg. SPICAM IR is a point nadir-looking spectrometer with sequential scanning of the spectrum by the AOTF. Sun occultations are performed with a help of dedicated solar port. We describe instrumentation, calibrations, and the modes of operations of the device and discuss its in-flight performances. A brief overview of the scientific measurements includes water vapor measurements and the mapping of intensity of the O 2 (a 1 D g ) emission at 1.27 mm, described in detail in separate papers. Measurements in reflected solar light allow clear detection of H 2 O and CO 2 ices on the surface or in the atmosphere of Mars. We discuss solar occultation measurements by SPICAM and present resulting vertical profiles of aerosol optical depth.

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“…Devices based on AOTF technology have already been successfully used in space-based instruments where compact AOTF-based spectrometers and cameras are used for research and process control. JPL has developed an AOTFbased spectrometer for aerospace applications in which the AOTF device was reported to have undergone radiation hardness testing [3]. One of the first spectroscopic applications of an AOTF-based spectrometer on a civilian spacecraft is in the SPICAM Light optical package [4,5].…”

Section: Introductionmentioning

confidence: 99%