OXYGEN SENSING USING SINGLE-FREQUENCY GAAS-ALGAAS DFB LASER-DIODES AND VCSELS

Authors
WELDON V OGORMAN J PEREZCAMACHO JJ HEGARTY J
Citation
V. Weldon et al., OXYGEN SENSING USING SINGLE-FREQUENCY GAAS-ALGAAS DFB LASER-DIODES AND VCSELS, Electronics Letters, 32(3), 1996, pp. 219-221
Citations number
8
Categorie Soggetti
Engineering, Eletrical & Electronic
Journal title
Electronics Letters → ACNP
ISSN journal
00135194
Volume
32
Issue
3
Year of publication
1996
Pages
219 - 221
Database
ISI
SICI code
0013-5194(1996)32:3<219:OSUSGD>2.0.ZU;2-I
Abstract
Oxygen detection using a GaAs-AlGaAs distributed feedback laser diode emitting at a wavelength of 761 nm is demonstrated for the first lime. Using wavelength modulation spectroscopy with harmonic detection the authors have achieved a detection limit of 20 ppm.m with a lock-in amp lifier time constant of 33.3 ms. The first results comparing the relat ive merits of VCSELs and DFB laser diodes for sensing applications are also shown.