Electro-optic modulator

Details Electro-optic modulator Electro-optic modulator

1989-11-06

1991-04-09

Moskowitz, Nelson

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

350355, 350392, 455612, 372 12, G02B 610, G02B 514

Patent

active

050059327

ABSTRACT:
An electro-optic modulator (10) includes a pair of optical waveguide channels (20, 22) formed in an X-cut lithium niobate substrate (12) and an overlying RF coplanar waveguide (36). A periodic electrode structure (48) of the intermittent interaction type employs a plurality of middle stubs (52) to maintain the phase of the RF drive frequency in phase with the optical signal. The modulator (10) also utilizes shorter stubs (64) and tapered inlets (42) and outlets (44) to match and transform impedances.

REFERENCES:
patent: 4208091 (1980-06-01), Cheo et al.
patent: 4263992 (1981-04-01), Beth et al.
patent: 4798437 (1989-01-01), Rediker et al.
Holman et al; "A Very High . . . Waveguide Modulator"; 1/80; IEEE, PP. TuE6/1-3, Conference; abst. only.
Podcameni, A.; "Symmetrical and . . . Loss Design"; IEEE Trans. Microwave Theory & Tech., vol. MTT-34, #1, 1/86, pp. 1-7, abst. only supplied.
Alferness et al; "Velocity Matching . . . Modulations", IEEE J. A. E., vol. QE20, #3, pp. 301-309, 3/84; abst. only.

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