Patent ID: 9678369
Date: 2017-06-13
CPC Classifications: G02F

Claim:
1. A device comprising: an electroabsorption modulator comprising a modulator capacitance, and a terminating impedance circuit connected in parallel to the electroabsorption modulator; wherein the terminating impedance circuit comprises an RF delay line comprising an impedance distributed over its length, wherein the spatially distributed impedance comprises a resistance per unit length, an inductance per unit length, and a parasitic capacitance per unit length, wherein the resistance per unit length and a line length of the RF delay line define a desired terminating impedance for the electroabsorption modulator, wherein the inductance per unit length and the line length of the RF delay line are selected to define, together with the modulator capacitance of the electroabsorption modulator, a damped resonant circuit system comprising a resonance frequency at a predefined value below an upper operating frequency limit of the electroabsorption modulator, thereby causing a controlled increase in the frequency response of the electroabsorption modulator within an operative frequency range, wherein the RF delay line is implemented to be a strip line, and wherein the RF delay line exhibits the following parameters: