Periodic domain reversal electro-optic modulator

Details Periodic domain reversal electro-optic modulator Periodic domain reversal electro-optic modulator

1993-02-04

1994-01-11

Lee, John D.

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

385 4, 385 9, 385 10, G02B 610

Patent

active

052789241

ABSTRACT:
In accordance with the teachings of the present invention, an enhanced performance opto-electric modulator (30 or 70) is provided herein which compensates for phase velocity mismatches between optical modulation and an RF electric signal. The modulator (30) includes an optical waveguide (38, 40) formed in a substrate (32) and coupled to an optical input (56). An RF waveguide (46, 48) is formed on the substrate (32) for applying an electric field (59) to a modulation region (50) adjacent the optical waveguide so as to modulate an optical signal. The substrate (32) has a ferroelectric domain which includes periodically inverted and non-inverted regions (54) and (52) which compensate for phase differences within the modulation region (50). In a preferred embodiment, the optical waveguide includes two substantially parallel optical waveguides (38) and (40) which have outputs combined to provide for an amplitude modulated (AM) optical output signal (60).

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