A novel fiber-optic intra-cavity sensing network using a mode-locked fiber ring laser

H.D. Yu, W. Jin, Y. Liao, G. Stewart, B. Culshaw, H. Ho, Y. Li

Research output: Contribution to conferencePaper

Abstract

A promising method for high sensitivity gas detection is intra-cavity spectroscopy [l] where the gas absorber is placed directly within a laser cavity. The high sensitivity arises from the very large number of passes through the gas cell within the cavity, effectively transforming a short absorption cell into a highly efficient multi-pass system. As a consequence a weak gas absorption line can have an enormous impact on the laser
output. Recently intra-cavity spectroscopy with fiber lasers has attracted considerable attention [2,3,4]. An all-fiber intra-cavity laser system can use the mature passive and active fiber components from the communications market with compact micro-optic gas cells, allowing safe, remote and continuous gas monitoring. Additionally, fiber laser sources have a broad gain bandwidth, such as the erbium-fiber laser with
gain over 1530-1580nm, and thus can be used as a source for a multi-gas sensor avoiding the cost of individual (DFB) lasers for each gas. However the high cost of the active fiber components such as the Erbium-Doped Fibre Amplifier (EDFA) would also limit the commercial application of single point measurements with intra-cavity
fiber spectroscopy. Ideally an intra-cavity system would be capable of making multi-point measurement of several gases within the gain spectrum of the erbium doped fibre laser. A multiplexed network would greatly reduce the cost per point by sharing the same fiber source and the same signal-processing unit.
In this paper, we present a system that combines a mode-locked fiber ring laser with intra-cavity spectroscopy to distinguish between different gas cells in a ladder sensing network. The system outputs strong pulsed lasing signals only when certain matching conditions are satisfied [5] and individual sensors are addressed by different frequencies of the mode-locked fiber ring laser.
LanguageEnglish
Pages507-510
Number of pages4
DOIs
Publication statusPublished - May 2002
Event15th Optical Fiber Sensors Conference - Portland, United States
Duration: 6 May 200210 May 2002

Conference

Conference15th Optical Fiber Sensors Conference
CountryUnited States
CityPortland
Period6/05/0210/05/02

Fingerprint

ring lasers
fiber lasers
fiber optics
cavities
gases
fibers
erbium
laser cavities
cells
costs
spectroscopy
sensitivity
sensors
ladders
lasing
signal processing
absorbers
amplifiers
communication
optics

Keywords

  • novel
  • fiber-optic
  • intra-cavity
  • sensing network
  • mode-locked
  • fiber ring laser

Cite this

Yu, H. D., Jin, W., Liao, Y., Stewart, G., Culshaw, B., Ho, H., & Li, Y. (2002). A novel fiber-optic intra-cavity sensing network using a mode-locked fiber ring laser. 507-510. Paper presented at 15th Optical Fiber Sensors Conference , Portland, United States. https://doi.org/10.1109/OFS.2002.1000735
Yu, H.D. ; Jin, W. ; Liao, Y. ; Stewart, G. ; Culshaw, B. ; Ho, H. ; Li, Y. / A novel fiber-optic intra-cavity sensing network using a mode-locked fiber ring laser. Paper presented at 15th Optical Fiber Sensors Conference , Portland, United States.4 p.
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Yu, HD, Jin, W, Liao, Y, Stewart, G, Culshaw, B, Ho, H & Li, Y 2002, 'A novel fiber-optic intra-cavity sensing network using a mode-locked fiber ring laser' Paper presented at 15th Optical Fiber Sensors Conference , Portland, United States, 6/05/02 - 10/05/02, pp. 507-510. https://doi.org/10.1109/OFS.2002.1000735

A novel fiber-optic intra-cavity sensing network using a mode-locked fiber ring laser. / Yu, H.D.; Jin, W.; Liao, Y.; Stewart, G.; Culshaw, B.; Ho, H.; Li, Y.

2002. 507-510 Paper presented at 15th Optical Fiber Sensors Conference , Portland, United States.

Research output: Contribution to conferencePaper

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AU - Yu, H.D.

AU - Jin, W.

AU - Liao, Y.

AU - Stewart, G.

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AU - Ho, H.

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KW - intra-cavity

KW - sensing network

KW - mode-locked

KW - fiber ring laser

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Yu HD, Jin W, Liao Y, Stewart G, Culshaw B, Ho H et al. A novel fiber-optic intra-cavity sensing network using a mode-locked fiber ring laser. 2002. Paper presented at 15th Optical Fiber Sensors Conference , Portland, United States. https://doi.org/10.1109/OFS.2002.1000735