Abstract

We propose a new method to measure polarization mode dispersion (PMD) in optical fibers based on optical frequency domain reflectometry technique. In this method the PMD is directly determined from the beat frequency generated by interference between lights from the Fresnel reflection at the end of the device under test, which makes the measurement at single end of the device possible. An automated PMD measurement system is demonstrated on polarization maintaining fibers with a frequency-shifted feedback fiber laser as a light source.

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References

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  1. C. D. Poole, R. E. Wagner, "Phenomenological approach to polarisation dispersion in long single-mode fires," Electron. Lett. 22, 1029-1030 (1986).
    [CrossRef]
  2. Y. Namihira, T. Kawazawa, and N. Norimatsu, "PMD reduction of optical fiber cables for transoceanic optical amplifier submarine cable systems," IWCS'93, 655-664 (1993).
  3. Y. Namihira and H. Wakabayashi, "Polarization mode dispersion measurements in an installed optical fiber submarine cable," IEEE Photon. Technol. Lett. 1, 329-331 (1989).
    [CrossRef]
  4. C. D. Poole, N. S. Bergano, R. E. Wagner, and H. J. Schulte, "Polarization dispersion and principal states in a 147-km undersea Lightwave cable," IEEE J. Lightwave Technol. 6, 1185-1190 (1988).
    [CrossRef]
  5. B. L. Heffner, "Automated measurement of polarization mode dispersion using Jones matrix eigenanalysis," IEEE Photon. Technol. Lett. 4, 1066-1069 (1992).
    [CrossRef]
  6. M. Yoshida, K. Nakamura and H. Ito, "A new method for measurement of group velocity dispersion of optical fibers by using a frequency-shifted feedback fiber laser," IEEE Photon. Technol. Lett. 13, 227-229 (2001).
    [CrossRef]
  7. K. Nakamura, K. Kasahara, M. Sato, and H. Ito, "Interferometric studies on a diode-pumped Nd:YVO4 laser with frequency-shifted feedback," Opt. Commun. 120, 134-140 (1995).
  8. K. Nakamura, F. Abe, K. Kasahara, T. Hara, M. Sato, and H. Ito, "Spectrum characteristics of an all solid-state frequency-shifted feedback laser," IEEE J. Quantum Electron. 33, 103-111 (1997).
    [CrossRef]
  9. K. Nakamura, F. V. Kowalski, and H. Ito, "Chirped frequency generation in a translated-grating-type frequency-shifted feedback laser," Opt. Lett. 22, 889-891 (1997).
    [CrossRef] [PubMed]

Other

C. D. Poole, R. E. Wagner, "Phenomenological approach to polarisation dispersion in long single-mode fires," Electron. Lett. 22, 1029-1030 (1986).
[CrossRef]

Y. Namihira, T. Kawazawa, and N. Norimatsu, "PMD reduction of optical fiber cables for transoceanic optical amplifier submarine cable systems," IWCS'93, 655-664 (1993).

Y. Namihira and H. Wakabayashi, "Polarization mode dispersion measurements in an installed optical fiber submarine cable," IEEE Photon. Technol. Lett. 1, 329-331 (1989).
[CrossRef]

C. D. Poole, N. S. Bergano, R. E. Wagner, and H. J. Schulte, "Polarization dispersion and principal states in a 147-km undersea Lightwave cable," IEEE J. Lightwave Technol. 6, 1185-1190 (1988).
[CrossRef]

B. L. Heffner, "Automated measurement of polarization mode dispersion using Jones matrix eigenanalysis," IEEE Photon. Technol. Lett. 4, 1066-1069 (1992).
[CrossRef]

M. Yoshida, K. Nakamura and H. Ito, "A new method for measurement of group velocity dispersion of optical fibers by using a frequency-shifted feedback fiber laser," IEEE Photon. Technol. Lett. 13, 227-229 (2001).
[CrossRef]

K. Nakamura, K. Kasahara, M. Sato, and H. Ito, "Interferometric studies on a diode-pumped Nd:YVO4 laser with frequency-shifted feedback," Opt. Commun. 120, 134-140 (1995).

K. Nakamura, F. Abe, K. Kasahara, T. Hara, M. Sato, and H. Ito, "Spectrum characteristics of an all solid-state frequency-shifted feedback laser," IEEE J. Quantum Electron. 33, 103-111 (1997).
[CrossRef]

K. Nakamura, F. V. Kowalski, and H. Ito, "Chirped frequency generation in a translated-grating-type frequency-shifted feedback laser," Opt. Lett. 22, 889-891 (1997).
[CrossRef] [PubMed]

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Figures (4)

Fig. 1.
Fig. 1.

Block diagram of PMD measurement based on OFDR technique.

Fig. 2.
Fig. 2.

Experimental setup for PMD measurement. WDM: wavelength-division multiplexer. OI: Optical Isolator. PC: Polarization controller.

Fig. 3.
Fig. 3.

Beat frequency versus rotation angle of λ/2 plate measured by the round-trip system with a 0.45 m-PMF as a FUT. The broken lines indicate the parabolic fitting curves.

Fig. 4.
Fig. 4.

Measured DGD value versus fiber length. The solid and broken lines indicate results measured by the double-pass and single-pass systems, respectively.

Equations (6)

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f B = γ Δ τ
I ( t ) = sin β cos β 1 0 0 U ( Δ τ ) cos α sin α sin α cos α 1 / 2 U ( τ o s ) / 2 e ( t ) 2
e ( t ) = E 0 [ j 2 π ( ν 0 t + γ 2 t 2 ) ]
I B 0 = 2 E 0 2 sin 2 α cos 2 β I B 1 = 2 E 0 2 cos 2 α sin 2 β I B 2 = 2 E 0 2 sin 2 α sin 2 β
Δ τ = ( f B 1 f B 2 ) / γ
ν i ( t ) = γ t q / τ R T , γ = ν F S / τ R T

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