Fiber optic systems for remote laser spectroscopy

Brian Culshaw

doi:10.1117/12.347967

Abstract

Gas spectroscopy based upon fiber optic systems is emerging as an important contributor to the art of remote measurement. To date two generic application sectors have emerged. The first is to make measurements in difficult and hazardous environments for which an integrated and passive optical source is extremely attractive. An optical fiber equipped with suitable collimation optics can furnish such a source. These systems have been utilized to measure gas flow and concentration in gas turbine engines and in hazardous chemical processes. The second applications sector lies in monitoring geographically widely spread locations at which the same measurement is continuously required. These occur for example in oil and gas exploration and processing systems and petrochemical plant. In this case it is the transmission capabilities of the optical fiber which are especially attractive. The optical fiber transmission medium implies that any optical signals which are used in the spectroscopic measurement lie in the near infra red with the absorption line strengths for most interesting species are relatively weak. However, modern source: detector combinations lead to very useful performance despite the weaker line strengths. This paper presents an analysis of the principal factors which determine system performance and illustrates these with some specific applications examples. Finally, we briefly explore the prospects offered by non-linear systems to produce remote spectroscopic measurements operating in the mid infra red but interohated and energized in the near infra red.

Citation Download Citation

Brian Culshaw, Brian Culshaw, "Fiber optic systems for remote laser spectroscopy", Proc. SPIE 3666, International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '98, (28 April 1999); doi: 10.1117/12.347967; https://doi.org/10.1117/12.347967

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Email or Username Forgot your username?

Password Forgot your password?

Show

Remember Email/Username on this computer

Remember Password

No SPIE account? Create an account
or Institutional Sign In via Shibboleth

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

Members: $14.40

Non-members: $18.00 ADD TO CART

Show All Keywords

Keywords/Phrases

Search In:

Publication Years