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Applied Optics

Applied Optics


  • Vol. 29, Iss. 30 — Oct. 20, 1990
  • pp: 4473–4480

Coherence tuned fiber optic sensing system, with self-initialization, based on a multimode laser diode

Awad Samir Gerges, T. P. Newson, and D. A. Jackson  »View Author Affiliations

Applied Optics, Vol. 29, Issue 30, pp. 4473-4480 (1990)

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In this paper we study the potential of using multimode laser diodes as an alternative to low coherence length sources normally used white light fiber optic interferometric sensors. A simple theoretical model is introduced to demonstrate the autocorrelation function of such sources. An experimental setup of two interferometers in tandem was used to study the coherence properties of the multimode laser diode Mitsubishi ML-4406 and then to demonstrate the possibility of using it in coherence tuned multiplexing systems. The main advantage of using such sources is to launch more optical power into the monomode fiber and hence to improve the system resolution.

© 1990 Optical Society of America

Original Manuscript: November 6, 1989
Published: October 20, 1990

Awad Samir Gerges, T. P. Newson, and D. A. Jackson, "Coherence tuned fiber optic sensing system, with self-initialization, based on a multimode laser diode," Appl. Opt. 29, 4473-4480 (1990)

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  1. D. A. Jackson, “Monomode Optical Fibre Interferometers for Precision Measurement,” J. Phys. E 18, 981–1001 (1985). [CrossRef]
  2. A. S. Gerges, F. Farahi, T. P. Newson, J. D. C. Jones, D. A. Jackson, “Fibre Optic Interferometric Sensor Using a Low Coherence Source: Dynamic Range Enhancement,” Int. J. Opto-electron. 13, 311–322 (1988).
  3. A. S. Gerges, T. P. Newson, F. Farahi, J. D. C. Jones, D. A. Jackson, “A Hemispherical Air Cavity Fibre Fabry-Perot Sensor,” Opt. Commun. 68, 157–160 (1988). [CrossRef]
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  5. S. Iida, K. Takata, Y. Unno, “Spectral Behaviour and Line width of (Ga Al) As-Ga As Double-Heterodyne Lasers at Room Temperature with Strip Geometry Configuration,” IEEE J. Quantum Electron. QE-9, 361–366 (1973). [CrossRef]
  6. A. R. Reisinger, C. D. David, K. L. Lawley, A. Yariv, “Coherence of a Room Temperature CW GaAs/GaAlAs Injection laser,” IEEE J. Quantum Electron. QE-15, 1382–1387 (1979). [CrossRef]
  7. M. V. Klein, T. E. Furtak, Optics (Wiley, New York, 1986), Chap. 8.
  8. A. D. Kersey, A. Dandridge, “Phase-Noise Reduction in Coherence-Multiplexed Interferometric Fibre Sensors,” Electron. lett. 22, 616–618 (1986). [CrossRef]

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