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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 16 — Aug. 15, 2010
  • pp: 2747–2749

Full-scale phase demodulation approach for photonic instantaneous frequency measurement

Xihua Zou, Wei Pan, Bin Luo, and Lianshan Yan  »View Author Affiliations


Optics Letters, Vol. 35, Issue 16, pp. 2747-2749 (2010)
http://dx.doi.org/10.1364/OL.35.002747


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Abstract

A full-scale phase demodulation approach based on two quadrature power ratios is proposed to perform photonic instantaneous frequency measurement (P-IFM). In the proposed approach, a delay-line interferometer (DLI) and two laser sources are used. The wavelengths of two lasers are located at the peak point of and at the 3 dB point of the comb filtering response of the DLI. Therefore, at the two wavelengths, a cosine-shape and a sine-shape filtering response are formed to process the + 1 st or 1 st order sidebands, which are generated by externally modulating the light waves of the two lasers with a microwave signal. After being filtered, two quadrature power ratios, cosine-shaped and sine-shaped responses, are obtained at the two wavelengths via power detection and power comparison. The phase term induced by the frequency is then demodulated from the two power ratios without ambiguity within the full-scale range of 0 2 π , the so-called full-scale phase demodulation, which has been verified in a proof-of-concept experiment. Unlike a half-scale range of 0 π , such a full-scale range of the proposed approach makes it a potential solution to design parallel or cascaded configurations to P-IFM to enhance the measurement range and the resolution.

© 2010 Optical Society of America

OCIS Codes
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(350.4010) Other areas of optics : Microwaves
(070.2615) Fourier optics and signal processing : Frequency filtering
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: April 19, 2010
Revised Manuscript: July 9, 2010
Manuscript Accepted: July 20, 2010
Published: August 12, 2010

Citation
Xihua Zou, Wei Pan, Bin Luo, and Lianshan Yan, "Full-scale phase demodulation approach for photonic instantaneous frequency measurement," Opt. Lett. 35, 2747-2749 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-16-2747

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