Design of a tuneable L-Band multi-wavelength laser system for application to gas spectroscopy

Joanna Marshall, George Stewart, Gillian Whitenett

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

We present multi-wavelength operation of single and double pass fibre laser systems by use of a micro-optic cell that doubles as both a Fabry-Perot cavity and a gas cell. The lasers utilize a silicon wafer to provide multiple lasing wavelengths with spacing between each of the peaks of 1 nm in the L-band wavelength region. The comb spectrum produced by the laser can be tuned to match the L-band absorption lines of a gas by the addition of a programmable variable attenuator into the laser. One gas of interest is hydrogen sulphide (H2S); it has absorption lines over the region 1570 nm-1580 nm with spacing of around 1 nm. The multiple lasing peaks could be coarsely tuned with large attenuation (5-9 dB) close to the absorption lines and then finely tuned by variation of 0.05-0.1 dB. Finally, we were able to equalize the power of three of the lasing peaks in both the lasers by adding polarization controllers, allowing us to reduce the amplitude variation to 0.6 dB for the single pass laser.
LanguageEnglish
Pages1023-1031
Number of pages8
JournalMeasurement Science and Technology
Volume17
Issue number4
DOIs
Publication statusPublished - Apr 2006

Fingerprint

gas spectroscopy
ultrahigh frequencies
Spectroscopy
Wavelength
Laser
Lasers
lasing
Gases
wavelengths
Absorption
lasers
Spacing
Line
gases
spacing
Micro-optics
Microoptics
Fabry-Perot Cavity
hydrogen sulfide
attenuators

Keywords

  • fibre amplifiers
  • fibre lasers
  • optical fibre sensors
  • gas sensors
  • absorption spectroscopy
  • L-band

Cite this

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title = "Design of a tuneable L-Band multi-wavelength laser system for application to gas spectroscopy",
abstract = "We present multi-wavelength operation of single and double pass fibre laser systems by use of a micro-optic cell that doubles as both a Fabry-Perot cavity and a gas cell. The lasers utilize a silicon wafer to provide multiple lasing wavelengths with spacing between each of the peaks of 1 nm in the L-band wavelength region. The comb spectrum produced by the laser can be tuned to match the L-band absorption lines of a gas by the addition of a programmable variable attenuator into the laser. One gas of interest is hydrogen sulphide (H2S); it has absorption lines over the region 1570 nm-1580 nm with spacing of around 1 nm. The multiple lasing peaks could be coarsely tuned with large attenuation (5-9 dB) close to the absorption lines and then finely tuned by variation of 0.05-0.1 dB. Finally, we were able to equalize the power of three of the lasing peaks in both the lasers by adding polarization controllers, allowing us to reduce the amplitude variation to 0.6 dB for the single pass laser.",
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Design of a tuneable L-Band multi-wavelength laser system for application to gas spectroscopy. / Marshall, Joanna; Stewart, George; Whitenett, Gillian.

In: Measurement Science and Technology, Vol. 17, No. 4, 04.2006, p. 1023-1031.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Marshall, Joanna

AU - Stewart, George

AU - Whitenett, Gillian

PY - 2006/4

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N2 - We present multi-wavelength operation of single and double pass fibre laser systems by use of a micro-optic cell that doubles as both a Fabry-Perot cavity and a gas cell. The lasers utilize a silicon wafer to provide multiple lasing wavelengths with spacing between each of the peaks of 1 nm in the L-band wavelength region. The comb spectrum produced by the laser can be tuned to match the L-band absorption lines of a gas by the addition of a programmable variable attenuator into the laser. One gas of interest is hydrogen sulphide (H2S); it has absorption lines over the region 1570 nm-1580 nm with spacing of around 1 nm. The multiple lasing peaks could be coarsely tuned with large attenuation (5-9 dB) close to the absorption lines and then finely tuned by variation of 0.05-0.1 dB. Finally, we were able to equalize the power of three of the lasing peaks in both the lasers by adding polarization controllers, allowing us to reduce the amplitude variation to 0.6 dB for the single pass laser.

AB - We present multi-wavelength operation of single and double pass fibre laser systems by use of a micro-optic cell that doubles as both a Fabry-Perot cavity and a gas cell. The lasers utilize a silicon wafer to provide multiple lasing wavelengths with spacing between each of the peaks of 1 nm in the L-band wavelength region. The comb spectrum produced by the laser can be tuned to match the L-band absorption lines of a gas by the addition of a programmable variable attenuator into the laser. One gas of interest is hydrogen sulphide (H2S); it has absorption lines over the region 1570 nm-1580 nm with spacing of around 1 nm. The multiple lasing peaks could be coarsely tuned with large attenuation (5-9 dB) close to the absorption lines and then finely tuned by variation of 0.05-0.1 dB. Finally, we were able to equalize the power of three of the lasing peaks in both the lasers by adding polarization controllers, allowing us to reduce the amplitude variation to 0.6 dB for the single pass laser.

KW - fibre amplifiers

KW - fibre lasers

KW - optical fibre sensors

KW - gas sensors

KW - absorption spectroscopy

KW - L-band

UR - http://dx.doi.org/10.1088/0957-0233/17/5/S15

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JO - Measurement Science and Technology

T2 - Measurement Science and Technology

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