Controllable electro-optical modulator/phase shifter using an in

Details Controllable electro-optical modulator/phase shifter using an in Controllable electro-optical modulator/phase shifter using an in

1982-04-07

1984-05-08

Moore, David K.

350 9612, G02B 5172

Patent

active

044471165

ABSTRACT:
An optical waveguide interferometer arrangement includes a single-mode optical waveguide device which diverges into two waveguide branches of identical optical length which converge into another single waveguide. The optical properties of the two branches are variable by electrical fields applied via adjacent electrodes, which are energized with a composite waveform comprising (for example) a symmetrical ramp superimposed on a square wave of the same period. The two component waveforms are in phase but of different amplitudes such that the output light is intensity modulated at a frequency which is some multiple of that of the input waveforms. Adjustment of the square wave amplitude provides the means to phase shift the optical output signal.

REFERENCES:
patent: 4070092 (1978-01-01), Burn
patent: 4070094 (1978-01-01), Martin
patent: 4340272 (1982-07-01), Papuchon et al.

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