Patent ID: 11927839
Assignee: II-VI DELAWARE, INC.
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 8:
9. An electro-absorption modulated laser comprising
a laser diode source biased to emit a CW optical beam; and
an electro-absorption optical modulator chip including
a substrate of a first conductivity type, the substrate defined as comprising a top major surface;
an electro-absorption modulating device formed along a longitudinal extent of the substrate, the electro-absorption modulating device including an active layer and an optical waveguiding layer of a second conductivity type disposed over the active layer, the optical waveguiding layer configured to receive the continuous wave (CW) optical beam from the laser diode source and generate an optically modulated output signal therefrom;
a dielectric layer disposed on a portion of the top major surface of the substrate at a spaced-apart location separate from the electro-absorption modulating device;
a conductive layer disposed over the dielectric layer, wherein the combination of the substrate, the dielectric layer and the conductive layer form a distributed capacitance within the electro-absorption optical modulator chip;
a stripline conductor disposed over an extended portion of the optical waveguiding layer;
an RF signal input path coupled to the stripline conductor for providing an electrical input RF modulating signal to the electro-absorption modulating device; and
a resistive RF signal termination path coupled between the stripline conductor and the conductive layer, the conductive layer providing an AC ground termination for the electrical input RF modulating signal of the electro-absorption modulated laser.