CONTROLLED-CAPACITANCE FULL-DEPLETION INTERDIGITATED PIN MODULATOR

摘要

A method of modulating an optical input with a radio frequency (RF) signal, an interdigitated modulator, and an electro-optical modulator including the interdigitated modulator are described. The method includes splitting the optical input to a first optical input and a second optical input, traversing a first region and a second region, respectively, with the first optical input and the second optical input, and modulating the first optical input with the RF signal in the first region. The method also includes controlling propagation speed of the RF signal in the first region, controlling RF line impedance in the first region, and controlling an optical loss of the first optical input in the first region.

主权项

1. An electro-optic modulator, comprising:
a splitter configured to split an optical input to a first optical input and a second optical input; a first region configured to be traversed by the first optical input; a second region configured to be traversed by the second optical input; and a single uninterrupted first radio signal (RF) path configured to be traversed by a first RF signal, wherein the first RF path includes the first region; and a phase modulator in the first region configured to modulate the first optical input with the RF signal and provide a first output, the phase modulator comprising
n-doped regions and p-doped regions, a majority of the n-doped regions and p-doped regions being arranged interdigitally; andan intrinsic region between each pair of one of the n-doped regions and one of the p-doped regions among the interdigitally arranged ones of the n-doped regions and the p-doped regions, whereina width of the intrinsic region is controlled to control a propagation speed and line impedance of the RF signal used to modulate the optical input in the modulator, anda width of each of the n-doped regions and each of the p-doped regions is controlled to control an optical loss of the optical input to the modulator.