The University of Southampton
University of Southampton Institutional Repository

Spectroscopic apparatus and method: Spectroscopic apparatus for measuring an amount of an analyte in a mixture using a frequency-modulated laser beam

Spectroscopic apparatus and method: Spectroscopic apparatus for measuring an amount of an analyte in a mixture using a frequency-modulated laser beam
Spectroscopic apparatus and method: Spectroscopic apparatus for measuring an amount of an analyte in a mixture using a frequency-modulated laser beam
There is described a spectroscopic apparatus 2 for measuring an amount of an analyte in a mixture. The apparatus 2 has a laser source 6 for generating a frequency-modulated laser beam 22. A cavity 36 receives the frequency-modulated laser beam 22 and a photodetector 46 obtains an intensity signal indicative of an interaction between the frequency-modulated laser beam 22 and the mixture. The apparatus 2 has a first demodulator 76 for producing a first demodulation signal. A frequency locking arrangement uses the first demodulation signal to lock a carrier frequency of the frequency-modulated laser beam 22 and a mode of the cavity 36 to each other. The apparatus has a second demodulator 50 for producing a second demodulation signal and for generating, on the basis of the second demodulation signal, an output indicative of the amount of the analyte in the mixture. The cavity 36 may be provided by a micro-resonator or Fabry-Perot etalon.
GB 2536187
Freegarde, Timothy
01a5f53b-d406-44fb-a166-d8da9128ea7d
Hawes, Edward Maxwell
cbca0637-1f15-4ec2-9baf-0d2d9e08d39e

Freegarde, Timothy and Hawes, Edward Maxwell (Inventors) (2016) Spectroscopic apparatus and method: Spectroscopic apparatus for measuring an amount of an analyte in a mixture using a frequency-modulated laser beam. GB 2536187.

Record type: Patent

Abstract

There is described a spectroscopic apparatus 2 for measuring an amount of an analyte in a mixture. The apparatus 2 has a laser source 6 for generating a frequency-modulated laser beam 22. A cavity 36 receives the frequency-modulated laser beam 22 and a photodetector 46 obtains an intensity signal indicative of an interaction between the frequency-modulated laser beam 22 and the mixture. The apparatus 2 has a first demodulator 76 for producing a first demodulation signal. A frequency locking arrangement uses the first demodulation signal to lock a carrier frequency of the frequency-modulated laser beam 22 and a mode of the cavity 36 to each other. The apparatus has a second demodulator 50 for producing a second demodulation signal and for generating, on the basis of the second demodulation signal, an output indicative of the amount of the analyte in the mixture. The cavity 36 may be provided by a micro-resonator or Fabry-Perot etalon.

Text
Spectroscopic apparatus for measuring an amount of an analyte in a mixture using a frequency-modulated laser - Accepted Manuscript
Download (8MB)

More information

Published date: 14 September 2016

Identifiers

Local EPrints ID: 414748
URI: http://eprints.soton.ac.uk/id/eprint/414748
PURE UUID: af27748e-c573-493f-a848-15dd88a8fabc
ORCID for Timothy Freegarde: ORCID iD orcid.org/0000-0002-0680-1330

Catalogue record

Date deposited: 10 Oct 2017 16:31
Last modified: 16 Mar 2024 03:35

Export record

Contributors

Inventor: Timothy Freegarde ORCID iD
Inventor: Edward Maxwell Hawes

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×