Development of fibre laser systems for ring-down and intracavity gas spectroscopy in the near-IR

G. Stewart, P. Shields, B. Culshaw

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We describe our progress in the development of intracavity systems with erbium fibre lasers using ring-down or intracavity laser absorption spectroscopy. Ring-down times have been extended out to several milliseconds and digital signal processing techniques introduced for removal of unwanted spectral components from the data and for display of the attenuation history. The theoretical sensitivity limits for intracavity absorption spectroscopy are discussed for a three-level laser, taking into account ground state absorption, and about three orders of magnitude enhancement in effective path length is expected. A detailed analysis has been performed on the relaxation oscillations induced during the transient operation of the laser with the aim of monitoring laser parameters and for the future development of an interrogation system for the capture of modal spectra in the presence of intracavity absorbers.
LanguageEnglish
Pages1621-1628
Number of pages7
JournalMeasurement Science and Technology
Volume15
Issue number8
DOIs
Publication statusPublished - 2004

Fingerprint

gas spectroscopy
Fiber Laser
Fiber lasers
fiber lasers
Spectroscopy
Absorption Spectroscopy
Laser
Absorption spectroscopy
Ring
Lasers
rings
absorption spectroscopy
Gases
lasers
Laser Spectroscopy
Relaxation Oscillations
Erbium
downtime
Laser spectroscopy
interrogation

Keywords

  • gas absorption
  • optical attenuation
  • fibre lasers
  • ring-down
  • intracavity absorption
  • environmental monitoring
  • safety monitoring
  • trace gas monitoring

Cite this

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abstract = "We describe our progress in the development of intracavity systems with erbium fibre lasers using ring-down or intracavity laser absorption spectroscopy. Ring-down times have been extended out to several milliseconds and digital signal processing techniques introduced for removal of unwanted spectral components from the data and for display of the attenuation history. The theoretical sensitivity limits for intracavity absorption spectroscopy are discussed for a three-level laser, taking into account ground state absorption, and about three orders of magnitude enhancement in effective path length is expected. A detailed analysis has been performed on the relaxation oscillations induced during the transient operation of the laser with the aim of monitoring laser parameters and for the future development of an interrogation system for the capture of modal spectra in the presence of intracavity absorbers.",
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Development of fibre laser systems for ring-down and intracavity gas spectroscopy in the near-IR. / Stewart, G.; Shields, P.; Culshaw, B.

In: Measurement Science and Technology, Vol. 15, No. 8, 2004, p. 1621-1628.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Development of fibre laser systems for ring-down and intracavity gas spectroscopy in the near-IR

AU - Stewart, G.

AU - Shields, P.

AU - Culshaw, B.

PY - 2004

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N2 - We describe our progress in the development of intracavity systems with erbium fibre lasers using ring-down or intracavity laser absorption spectroscopy. Ring-down times have been extended out to several milliseconds and digital signal processing techniques introduced for removal of unwanted spectral components from the data and for display of the attenuation history. The theoretical sensitivity limits for intracavity absorption spectroscopy are discussed for a three-level laser, taking into account ground state absorption, and about three orders of magnitude enhancement in effective path length is expected. A detailed analysis has been performed on the relaxation oscillations induced during the transient operation of the laser with the aim of monitoring laser parameters and for the future development of an interrogation system for the capture of modal spectra in the presence of intracavity absorbers.

AB - We describe our progress in the development of intracavity systems with erbium fibre lasers using ring-down or intracavity laser absorption spectroscopy. Ring-down times have been extended out to several milliseconds and digital signal processing techniques introduced for removal of unwanted spectral components from the data and for display of the attenuation history. The theoretical sensitivity limits for intracavity absorption spectroscopy are discussed for a three-level laser, taking into account ground state absorption, and about three orders of magnitude enhancement in effective path length is expected. A detailed analysis has been performed on the relaxation oscillations induced during the transient operation of the laser with the aim of monitoring laser parameters and for the future development of an interrogation system for the capture of modal spectra in the presence of intracavity absorbers.

KW - gas absorption

KW - optical attenuation

KW - fibre lasers

KW - ring-down

KW - intracavity absorption

KW - environmental monitoring

KW - safety monitoring

KW - trace gas monitoring

UR - http://dx.doi.org/10.1088/0957-0233/15/8/033

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