Optical phase modulator

Details Optical phase modulator Optical phase modulator

2011-01-11

2011-01-11

Pak, Sung H (Department: 2874)

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

Reexamination Certificate

active

07869669

ABSTRACT:
The invention provides an optical phase modulator having a substrate made of an electro-optical material, a signal electrode provided on the substrate and first and second ground electrodes provided on both sides of the signal electrode. The electrodes are provided so that a size of the first gap between the first ground electrode and the signal electrode is smaller than a size of a second gap between the second ground electrode and the signal electrode. Furthermore, an optical waveguide is provided in the first gap as an optical phase modulator and not provided in the second gap. A driving voltage required for the phase adjustments is thereby lowered, the impedance matching is easily made and excellent radio frequency property can be realized.

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Masayuki Izutsu, et al., “Band Operation of Guided-Wave Light Modulators with Filter-Type Coplanar Electrodes,” IEICE Trans. Electron. vol. E78-C, No. 1, Jan. 1995, pp. 55-59.

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