Development of a portable carbon monoxide optical sensor based on an extended cavity diode laser at 1564 nm

Eva S. Norris; Sile G. Nic Chormaic

doi:10.1117/12.464002

27 August 2003 Development of a portable carbon monoxide optical sensor based on an extended cavity diode laser at 1564 nm

Eva S. Norris, Sile G. Nic Chormaic

Author Affiliations +

Proceedings Volume 4876, Opto-Ireland 2002: Optics and Photonics Technologies and Applications; (2003) https://doi.org/10.1117/12.464002
Event: OPTO Ireland, 2002, Galway, Ireland

Abstract

Carbon monoxide (CO) is a major trace gas pollutant with road traffic being responsible for most emissions. Tunable diode laser absorption spectroscopy will be used to measure CO in vehicle emissions, thereby identifying offenders. A portable device will be constructed, which is capable of measuring CO at concentrations of 10 ppm. Design emphasis is on using low cost commercial components. An extended cavity diode laser (ECDL) will be used offering a narrow line width (» 350 kHz) and operated at 1564 nm (near infrared) to allow detection of the CO line R(13). This wavelength has been selected primarily because commercial optics components designed for the telecommunications industry at 1550 nm are readily available and relatively inexpensive. A potential tuning range of 20 nm about the central wavelength for the ECDL also offers potential for detection of other combustion related, gas species in this spectral region using the same diode laser. Novel optical arrangements allowing longer absorption path lengths and hence increased sensitivity of the CO sensor will be investigated. In addition to road traffic pollution measurements, the device will be adapted for use with fibre optic technology, to facilitate air quality measurements in remote locations e.g. stack emissions.

Citation Download Citation

Eva S. Norris and Sile G. Nic Chormaic "Development of a portable carbon monoxide optical sensor based on an extended cavity diode laser at 1564 nm", Proc. SPIE 4876, Opto-Ireland 2002: Optics and Photonics Technologies and Applications, (27 August 2003); https://doi.org/10.1117/12.464002

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available