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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea

| PUBLISHED BY THE OPTICAL SOCIETY OF KOREA

  • Vol. 14, Iss. 3 — Sep. 1, 2010
  • pp: 240–244

Current-induced Phase Demodulation Using a PWM Sampling for a Fiber-optic CT

Hyoung-Jun Park, June-Ho Lee, Hyun-Jin Kim, and Min-Ho Song  »View Author Affiliations


Journal of the Optical Society of Korea, Vol. 14, Issue 3, pp. 240-244 (2010)


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Abstract

In this work, we used PWM sampling for demodulation of a fiber-optic interferometric current transformer. The interference signal from a fiber-optic CT is sampled with PWM triggers that produce a 90-degree phase difference between two consecutively sampled signals. The current-induced phase is extracted by applying an arctangent demodulation and a phase unwrapping algorithm to the sampled signals. From experiments using the proposed demodulation, we obtained phase measurement accuracy and a linearity error, in AC current measurements, of ~2.35 mrad and 0.18%, respectively. The accuracy of the proposed method was compared with that of a lock-in amplifier demodulation, which showed only 0.36% difference. To compare the birefringence effects of different fiber-optic sensor coils, a flint glass fiber and a standard single-mode fiber were used under the same conditions. The flint glass fiber coil with a Faraday rotator mirror showed the best performance. Because of the simple hardware structure and signal processing, the proposed demodulation would be suitable for low-cost over-current monitoring in high voltage power systems.

© 2010 Optical Society of Korea

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.5060) Fiber optics and optical communications : Phase modulation
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

History
Original Manuscript: May 11, 2010
Revised Manuscript: June 23, 2010
Manuscript Accepted: June 24, 2010
Published: September 25, 2010

Citation
Hyoung-Jun Park, June-Ho Lee, Hyun-Jin Kim, and Min-Ho Song, "Current-induced Phase Demodulation Using a PWM Sampling for a Fiber-optic CT," J. Opt. Soc. Korea 14, 240-244 (2010)
http://www.opticsinfobase.org/josk/abstract.cfm?URI=josk-14-3-240


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References

  1. A. Papp and H. Harms, “Magneto optical current transformer. 1: principles,” Appl. Opt. 19, 3729-3734 (1980). [CrossRef]
  2. A. J. Rogers, “Optical-fiber current measurement,” Int. J. Optoelectron. 3, 391-407 (1988).
  3. J. Barlow and D. N. Payne, “Production of single mode fibers with negligible intrinsic birefringence,” Electron. Lett. 17, 725-726 (1986). [CrossRef]
  4. G. W. Day, K. B. Rochford, and A. H. Rose, “Fundamentals and problems of fiber current sensors,” in Proc. 11th OFS Conference (Sapporo, Japan, May 1996), paper We1S1.
  5. K. Bohnert, P. Gabus, J. Nehring, and H. Brandle, “Temperature and vibration insensitive fiber-optic current sensor,” IEEE J. Lightwave Technol. Lett. 20, 267-276 (2002). [CrossRef]
  6. J. Blake, P. Tantaswadi, and R. T. DeCarvalho, “In-line Sagnac interferometer current sensor,” IEEE Trans. Power Deliv. 11, 116-121 (1996). [CrossRef]
  7. J. Blake, “Fiber optic current sensor calibration,” in Proc. IEEE T&D Conference (Atlanta World Congress Center, USA, Oct. 2001), pp. 127-130.
  8. Y. L. Lo, “In-fiber Bragg grating sensors using interferometric interrogations for passive quadrature signal processing,” IEEE Photon. Technol. Lett. 10, 1003-1005 (1998). [CrossRef]
  9. M. O. Jeong, N. Kim, and J. H. Park, “Elemental image synthesis for integral imaging using phase-shifting digital holography,” J. Opt. Soc. Korea 12, 275-280 (2008). [CrossRef]
  10. S. H. Jeon and S. K. Gil, “Measurement of a mirror surface topography using 2-frame phase-shifting digital interferometry,” J. Opt. Soc. Korea 13, 245-250 (2009). [CrossRef]
  11. M. Song, S. Yin, and P. B. Ruffin, “Fiber Bragg grating strain sensor demodulation with quadrature sampling of a Mach-Zehnder interferometer,” Appl. Opt. 39, 1106-1111 (2000). [CrossRef]
  12. J. Zhongxie and M. Song, “Fiber grating sensor array interrogation with time-delayed sampling of a wavelength-scanned fiber laser,” IEEE Photon. Technol. Lett. 16, 1924-1926 (2004). [CrossRef]
  13. K. Kurosawa, “Optical current transducers using flint glass fiber as the faraday sensor element,” Opt. Rev. 4, 38-44 (1997) [CrossRef]

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