Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 1621-1628 |
| Number of pages | 7 |
| Journal | Measurement Science and Technology |
| Volume | 15 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2004 |
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Keywords
- gas absorption
- optical attenuation
- fibre lasers
- ring-down
- intracavity absorption
- environmental monitoring
- safety monitoring
- trace gas monitoring
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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 journal › Article
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
Y1 - 2004
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
U2 - 10.1088/0957-0233/15/8/033
DO - 10.1088/0957-0233/15/8/033
M3 - Article
VL - 15
SP - 1621
EP - 1628
JO - Measurement Science and Technology
JF - Measurement Science and Technology
SN - 0957-0233
IS - 8
ER -