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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 28, Iss. 5 — Mar. 1, 2010
  • pp: 725–734

Electro-Optic Resonant FSR Modulators Based on a Dual-Disc Resonator for Increasing the Sensitivity-Bandwidth Product

Yoo Seung Lee, Sang-Shin Lee, and William H. Steier

Journal of Lightwave Technology, Vol. 28, Issue 5, pp. 725-734 (2010)

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Resonant free-spectral-range (FSR) RF-optic modulators using dual-disc resonators with a 2:1 ratio of the radii of the discs have been proposed and theoretically analyzed to increase the sensitivity–bandwidth product compared with that of a single resonator modulator. The transmission of the coupled resonator structure is analyzed for various coupling parameters. The phase of the larger resonator is electro-optically modulated, and the output fields at the input laser frequency and the generated sideband frequencies are calculated. The detected RF power is then calculated. The modulator sensitivity, 3-dBe modulation bandwidth, and their product have been analyzed. The sensitivity and modulation bandwidth can be increased by factors of 1.9 and 6.4, respectively, for the different cases. The sensitivity–bandwidth product can be increased up to a factor of 3.3 in one design. For ${\pm}5\hbox{\%}$ error of the ratio of the radius of each disc, errors of the sensitivity and modulation bandwidth were acceptable.

© 2010 IEEE

Yoo Seung Lee, Sang-Shin Lee, and William H. Steier, "Electro-Optic Resonant FSR Modulators Based on a Dual-Disc Resonator for Increasing the Sensitivity-Bandwidth Product," J. Lightwave Technol. 28, 725-734 (2010)

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