LASER-DIODE BASED OXYGEN SENSING - A COMPARISON OF VCSEL AND DFB LASER-DIODES EMITTING IN THE 762 NM REGION

Authors
WELDON V OGORMAN J PEREZCAMACHO JJ MCDONALD D HEGARTY J CONNOLLY JC MORRIS NA MARTINELLI RU ABELES JH
Citation
V. Weldon et al., LASER-DIODE BASED OXYGEN SENSING - A COMPARISON OF VCSEL AND DFB LASER-DIODES EMITTING IN THE 762 NM REGION, Infrared physics & technology, 38(6), 1997, pp. 325-329
Citations number
11
Categorie Soggetti
Optics,"Physics, Applied
Journal title
Infrared physics & technology → ACNP
ISSN journal
13504495
Volume
38
Issue
6
Year of publication
1997
Pages
325 - 329
Database
ISI
SICI code
1350-4495(1997)38:6<325:LBOS-A>2.0.ZU;2-C
Abstract
The performance of VCSEL and DFB laser diodes for spectroscopic based high sensitivity oxygen sensing is compared. Detectivities of < 20 ppm m using the DFB laser diode and < 7 x 10(3) ppm m using the VCSEL wer e determined utilising wavelength modulation spectroscopy and harmonic detection. We assess factors influencing the relative performance of these devices, including spectral resolution, laser optical power and light current curve linearity. (C) 1997 Elsevier Science B.V.