Optical waveguides – Temporal optical modulation within an optical waveguide – Electro-optic
Patent
1996-03-29
1997-10-07
Lee, John D.
Optical waveguides
Temporal optical modulation within an optical waveguide
Electro-optic
385 40, G02B 610, G02F 101
Patent
active
056756739
ABSTRACT:
An optical modulator having an electrode structure which is divided into a plurality of relatively small segments is described. The segments are connected via bond wires and transmission lines on an adjoining microwave circuit board. The optical modulator includes a pair of waveguides which are sloped so as to result in a nonparallel waveguide structure which reduces acoustic effects, e.g., ripple. By using a plurality of small segments to implement the electrode structure a high degree of sensitivity is achieved as compared to when a single lengthy electrode structure is used. The combination of the non-parallel waveguides and a segmented electrode provides for a relatively large flat frequency response, e.g., in excess of 1 GHz. The electrode structure is also designed to minimize the effective capacitance of the electrode structure to thereby broaden the bandwidth of the optic modulator of the present invention as compared to devices using solid electrodes.
REFERENCES:
patent: 4776657 (1988-10-01), Reeder
patent: 5153770 (1992-10-01), Harris
patent: 5193128 (1993-03-01), Farina et al.
patent: 5291565 (1994-03-01), Schaffner et al.
Crystal Technology, Inc.
Lee John D.
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