Optical waveguides – Temporal optical modulation within an optical waveguide – Electro-optic
Patent
1995-03-10
1997-03-11
Lee, John D.
Optical waveguides
Temporal optical modulation within an optical waveguide
Electro-optic
359248, 385 10, G02F 1015
Patent
active
056110030
ABSTRACT:
An electro-optical semiconductor modulator includes two successive segments (SA, SD) each of which applies both attenuation and a phase shift to a light wave (12) in response to a control voltage for controlling the segment. The two segments belong to the same structure having multiple quantum wells. A control generator (4) develops the AC components of the two control voltages (MA, MD) respectively in the form of two different combinations of a reference attenuation (A) and of a reference phase shift (D) to be applied to the light wave (12). The control generator also supplies two DC components (VA, VD) of the control voltages with two different values that are chosen so as to enable the two combinations to actually apply the attenuation (A) and the phase shift (D) to the wave. The invention is applicable in particular to implementing an optical link having a high data-rate.
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Langanay Jerome
Lesterlin Dominique
Provost Jean-Guy
ALCATEL N.V.
Lee John D.
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