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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 16, Iss. 2 — Feb. 1, 1998
  • pp: 232–

Electrode Optimization for High-Speed Traveling-Wave Integrated Optic Modulators

Kwok Wah Hui, Kin Seng Chiang, Boyu Wu, and Z. H. Zhang

Journal of Lightwave Technology, Vol. 16, Issue 2, pp. 232- (1998)


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Abstract

Different electrode configurations for LiNbO3-based Mach-Zehnder traveling-wave electrooptic modulators are analyzed. It is found that the Z-cut coplanar waveguide (CPW) configuration provides the best compromise between the characteristic impedance, the half-wave voltage, and the driving power. To increase the bandwidth and simultaneously reduce the half-wave voltage, an optimum design of multisection phase reversal electrode is proposed. To verify the theoretical predictions experimentally, two modulators, both using the Z-cut LiNbO3 CPW configuration, were fabricated and characterized, one with an optimized five-section phase reversal electrode and the other with a conventional single-section electrode. By comparing the performances of these two devices, it is confirmed that significant improvements on the bandwidth to half-wave voltage ratio and the flatness of the frequency response can indeed be obtained from using an optimized multisection phase reversal electrode.

[IEEE ]

Citation
Kwok Wah Hui, Kin Seng Chiang, Boyu Wu, and Z. H. Zhang, "Electrode Optimization for High-Speed Traveling-Wave Integrated Optic Modulators," J. Lightwave Technol. 16, 232- (1998)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-16-2-232


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References

  1. W. K. Burns, "Analytic output expression for integrated optic phase reversal modulators with microwave loss," Appl. Opt., vol. 28, pp. 3280-3283, Aug. 1989.
  2. D. Erasme, D. A. Humphreys, A. G. Roddie, and M. G. F. Wilson, "Design and performance of phase reversal traveling wave modulators," J. Lightwave Technol., vol. 6, pp. 933-936, June 1988.

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