Abstract

Dispersion fiber sensitivity in optical microwave upconversion links is investigated. Simulations are carried out to calculate output optical spectra and to evaluate mixing power as a function of fiber length for different upconversion systems using dual drive/standard Mach-Zehnder modulators or an unbalanced Mach-Zehnder interferometer (UMZ). The latter solution prevents complete cancellation of mixing power because of the asymmetric double sideband optical spectrum detected at the output of the UMZ. It is shown that an optimum value of the linewidth enhancement factor of the laser diode can be found to minimize degradations of the mixing power along the fiber.

© 2003 IEEE

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  8. Y. Le Guennec, G. Maury and B. Cabon, "BER performance comparison between active Mach-Zehnder modulator and passive Mach-Zehnder interferometer for conversion of microwave sub-carriers of BPSK signals", Microwave Opt. Technol. Lett., pp. 496-498, Mar. 20, 2003.

Other (8)

G. H. Smith, D. Novak and Z. Ahmed, "Technique for optical SSB generation to overcome dispersion penalties in fiber-radio systems", Electron. Lett., vol. 33, no. 1, pp. 74-75, 1997.

G. H. Smith, D. Novak and Z. Ahmed, "Overcoming chromatic-dispersion effects in fiber-wireless systems incorporating external modulators", IEEE Trans. Microwave Theory Tech., vol. 45, no. 8, pp. 1410-1415, 1997 .

A. Seeds, "Optical technologies for phased array antennas", IEICE Trans. Electron., vol. E76-C, no. 2, pp. 198-206, Feb. 1993.

G. Maury, A Hilt, T. Berceli, B. Cabon and A. Vilcot, "Microwave-frequency conversion methods by optical interferometer and photodiode", IEEE Trans. Microwave Theory Tech., vol. 45, pp. 1481-1485, Aug. 1997 .

J. L. Corral, J. Marti and J. M. Fuster, "General expressions for IM/DD dispersive analog optical links with external modulation or optical upconversion in a Mach-Zehnder electrooptical modulator", IEEE Trans. Microwave Theory Tech., vol. 49, no. 10, pp. 1968-1976, 2001.

Y. Le Guennec, B. Cabon and G. Maury, "Conversions of the microwave subcarriers of digital signals in optical links", presented at the LEOS Conf., San Diego, CA, Nov. 2001.

R. C. Heung, O. Beom-Hoan, D. P. Chong, M. K. Hyung, S. K. Jeong, K. O. Dae, M. K. Hong and E. P. Kwang, "Improvement of linewidth enhancement factor in 1.55-µ m multiple-quatum-well laser diodes", IEEE Photon. Technol. Lett., vol. 10, no. 5, pp. 645 -647, May 1998.

Y. Le Guennec, G. Maury and B. Cabon, "BER performance comparison between active Mach-Zehnder modulator and passive Mach-Zehnder interferometer for conversion of microwave sub-carriers of BPSK signals", Microwave Opt. Technol. Lett., pp. 496-498, Mar. 20, 2003.

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