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Proceedings Paper

Nondispersive and multichannel analyzers based on mid-IR LEDs and arrays
Author(s): Jouko Malinen; Tapio Hannula; Nonna V. Zotova; Sergey A. Karandashev; I. I. Markov; Boris A. Matveev; Nikolai M. Stus; Georgii N. Talalakin
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Paper Abstract

This paper briefly describes the fabrication of infrared light emitting diodes by liquid phase epitaxy including both InGaAs LEDs for emission wavelengths from 2.5 to 3.8 micrometers and InAsSbP for wavelengths from 3.8 to 4.7 micrometers . Some of the first applications of these LEDs in spectroscopic instrumentation are described together with the main instrument characteristics. Nondispersive analyzers have been developed for CH4 and CO detection utilizing LED sources emitting at 3.3 and 4.7 micrometers , respectively. A novel infrared spectrometer construction has been developed based on a linear LED array emitting at 3.3 micrometers and a fixed grating monochromator. This miniature construction can be used as an electrically scanned spectrometer module in future IR analyzers for portable and process on- line applications.

Paper Details

Date Published: 31 December 1993
PDF: 7 pages
Proc. SPIE 2069, Optical Methods for Chemical Process Control, (31 December 1993); doi: 10.1117/12.166278
Show Author Affiliations
Jouko Malinen, Technical Research Ctr. of Finland (Finland)
Tapio Hannula, Technical Research Ctr. of Finland (Finland)
Nonna V. Zotova, A.F. Ioffe Physical-Technical Institute (Russia)
Sergey A. Karandashev, A.F. Ioffe Physical-Technical Institute (Russia)
I. I. Markov, A.F. Ioffe Physical-Technical Institute (Russia)
Boris A. Matveev, A.F. Ioffe Physical-Technical Institute (Russia)
Nikolai M. Stus, A.F. Ioffe Physical-Technical Institute (Russia)
Georgii N. Talalakin, A.F. Ioffe Physical-Technical Institute (Russia)

Published in SPIE Proceedings Vol. 2069:
Optical Methods for Chemical Process Control
Stuart Farquharson; Jeremy M. Lerner, Editor(s)

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