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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 19, Iss. 5 — May. 1, 2001
  • pp: 687–

Large-Scale Multiplexing of Interferometric Fiber-Optic Sensors Using TDM and DWDM

Geoffrey A. Cranch and Philip J. Nash

Journal of Lightwave Technology, Vol. 19, Issue 5, pp. 687- (2001)


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Abstract

This paper describes multiplexing schemes for interferometric fiber sensors based on time-division multiplexed and dense wavelength-division multiplexing using optical add/drop multiplexers. The results of an experimental arrangement, which is based on one of the architectures, is also presented. Topics include a discussion of the noise sources in the system, dynamic range,and a characterization of the distributed feedback fiber laser source noise. We show the crosstalk levels in the experimental arrangement to be between -47 and -76 dB depending on the mechanism involved. The multiplexing schemes demonstrate the potential to address at least 192 interferometric sensors through two fibers based on a system with six wavelengths with a phase resolution less than 20 µrad/vHz. For application to sonar arrays, our analysis has shown that hydrophones multiplexed in this type of architecture would achieve ambient acoustic noise-limited pressure resolution with an in-water dynamic range up to 135 dB at frequencies up to 10 kHz. In general, these architectures would find application in systems requiring very large numbers of sensors with a minimum of telemetry cabling required.

© 2001 IEEE

Citation
Geoffrey A. Cranch and Philip J. Nash, "Large-Scale Multiplexing of Interferometric Fiber-Optic Sensors Using TDM and DWDM," J. Lightwave Technol. 19, 687- (2001)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-19-5-687


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References

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