Ricardo A Aroca

20170285437, Oct 5, 2017

Mar 29, 2017

15/472946

- Maynard MA, US
Long Chen - Marlboro NJ, US
Ricardo Aroca - New York NY, US

Acacia Communications, Inc. - Maynard MA

G02F 1/225
G02F 1/025

An optical Mach Zehnder modulator is described. The optical Mach Zehnder modulator may comprise a plurality of segments separated by curved waveguides. For example, an optical Mach Zehnder modulator may comprise a first waveguide arm having a first pn-junction formed therein, a second waveguide arm having a second pn-junction formed therein, a third waveguide arm coupled to the first waveguide arm via a first curved waveguide and a fourth waveguide arm coupled to the second waveguide arm via a second curved waveguide. The segments may have the same polarities. Alternatively, the segments may have opposite polarities. The different segments may be driven using different RF signals. The RF signals may be delayed from one another.

20150295650, Oct 15, 2015

Apr 11, 2014

14/250978

- Murray Hill NJ, US
Ricardo A. Aroca - Springfield NJ, US
Po Dong - Morganville NJ, US

ALCATEL-LUCENT USA INC. - Murray Hill NJ

H04B 10/2575
H04B 10/60
H04B 10/516

We disclose an opto-electronic circuit having an optical modulator and a driver circuit configured to generate a plurality of electrical drive signals for the optical modulator in a manner that causes the opto-electronic circuit to operate as a finite-impulse-response (FIR) filter. Different electrical drive signals generated by the driver circuit represent different taps of the FIR filter and are individually applied to different respective electrodes in the optical modulator without first being combined with one another prior to said individual application. The optical modulator represents an adder of the FIR filter and is configured to use the applied electrical drive signals to perform signal summation in the optical domain, thereby alleviating some of the limitations associated with the electrical RF circuitry used in the driver circuit. The opto-electronic circuit can be employed in optical transceivers and equalizers and be configured to implement signal pre-emphasis, feed-forward equalization, or decision-feedback equalization.