A Modified 1x2 Directional Coupler Modulator With Low Drive Voltage

Suwat Thaniyavarn

doi:10.1117/12.937439

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23 February 1987 A Modified 1x2 Directional Coupler Modulator With Low Drive Voltage

Suwat Thaniyavarn

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Proceedings Volume 0716, High Frequency Optical Communications; (1987) https://doi.org/10.1117/12.937439
Event: Cambridge Symposium-Fiber/LASE '86, 1986, Cambridge, MA, United States

Abstract

A novel modified electro-optic Ti:LiNb01 lx2 directional coupler modulator is demonstrated. The modulator consists of a single-mode input waveguide which branches into a pair of optically coupled single-mode waveguides. Due to the symmetry of the modulator configuration, the half-power 3-dB operating point is automatically achieved without the need for a DC bias voltage. It is compatible with an efficient push-pull traveling wave type electrode structure for ultra high speed operation, utilizing the largest r₃₃ electro-optic coefficient. In addition, the device can be used as a lx2 optical switch, requiring a lower drive voltage than a conventional directional coupler switch.

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Suwat Thaniyavarn "A Modified 1x2 Directional Coupler Modulator With Low Drive Voltage", Proc. SPIE 0716, High Frequency Optical Communications, (23 February 1987); https://doi.org/10.1117/12.937439

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