Abstract

Time-domain reflectometry of spontaneous Brillouin scattering in a single-mode optical fiber is performed with a coherent self-heterodyne detection system containing a recently proposed external frequency translator and a single light-wave source. The light wave is divided into probe and reference light waves. The frequency of the probe light wave is upconverted by the translator by an amount approximately equal to the Brillouin frequency shift. The frequency-converted probe is launched into the fiber and spontaneously Brillouin scattered. As the frequency of the scattered probe is downconverted to near that of the reference light wave, coherent self-heterodyne detection of spontaneous Brillouin scattering becomes possible without having to use a fast-speed detector.

© 1993 Optical Society of America

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References

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  1. T. Horiguchi, T. Kurashima, M. Tateda, IEEE Photon. Technol. Lett. 2, 352 (1990).
    [CrossRef]
  2. T. Kurashima, T. Horiguchi, M. Tateda, Opt. Lett. 15, 1038 (1990).
    [CrossRef] [PubMed]
  3. Y. Koyamada, H. Nakamoto, Electron. Lett. 26, 573 (1990).
    [CrossRef]
  4. K. Shimizu, T. Horiguchi, Y. Koyamada, Opt. Lett. 17, 1307 (1992).
    [CrossRef] [PubMed]
  5. G. P. Agrawal, Nonlinear Fiber Optics (Academic, San Diego, Calif., 1989), Chap. 9.

1992 (1)

1990 (3)

T. Horiguchi, T. Kurashima, M. Tateda, IEEE Photon. Technol. Lett. 2, 352 (1990).
[CrossRef]

T. Kurashima, T. Horiguchi, M. Tateda, Opt. Lett. 15, 1038 (1990).
[CrossRef] [PubMed]

Y. Koyamada, H. Nakamoto, Electron. Lett. 26, 573 (1990).
[CrossRef]

Agrawal, G. P.

G. P. Agrawal, Nonlinear Fiber Optics (Academic, San Diego, Calif., 1989), Chap. 9.

Horiguchi, T.

Koyamada, Y.

Kurashima, T.

T. Horiguchi, T. Kurashima, M. Tateda, IEEE Photon. Technol. Lett. 2, 352 (1990).
[CrossRef]

T. Kurashima, T. Horiguchi, M. Tateda, Opt. Lett. 15, 1038 (1990).
[CrossRef] [PubMed]

Nakamoto, H.

Y. Koyamada, H. Nakamoto, Electron. Lett. 26, 573 (1990).
[CrossRef]

Shimizu, K.

Tateda, M.

T. Horiguchi, T. Kurashima, M. Tateda, IEEE Photon. Technol. Lett. 2, 352 (1990).
[CrossRef]

T. Kurashima, T. Horiguchi, M. Tateda, Opt. Lett. 15, 1038 (1990).
[CrossRef] [PubMed]

Electron. Lett. (1)

Y. Koyamada, H. Nakamoto, Electron. Lett. 26, 573 (1990).
[CrossRef]

IEEE Photon. Technol. Lett. (1)

T. Horiguchi, T. Kurashima, M. Tateda, IEEE Photon. Technol. Lett. 2, 352 (1990).
[CrossRef]

Opt. Lett. (2)

Other (1)

G. P. Agrawal, Nonlinear Fiber Optics (Academic, San Diego, Calif., 1989), Chap. 9.

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Figures (5)

Fig. 1
Fig. 1

Configuration of the external frequency translator.

Fig. 2
Fig. 2

Configuration of the Brillouin OTDR employing coherent self-heterodyne detection. ISO, isolator.

Fig. 3
Fig. 3

Rf spectrum envelope of a probe frequency shift. The horizontal scale is 20 MHz/division. RSW, reference spectral width.

Fig. 4
Fig. 4

Backscattered profiles in a 10-km fiber for frequency differences of (a) 11.005 GHz and (b) 10.990 GHz.

Fig. 5
Fig. 5

Brillouin spectrum profile. The open circles are measured values and are fitted with a Lorentzian curve.

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