Christopher R Doerr

US Patent:

20220326586, Oct 13, 2022

Filed:

Apr 9, 2021

Appl. No.:

17/226730

Inventors:

- Irvine CA, US
Christopher R. Doerr - Irvine CA, US

Assignee:

Aloe Semiconductor Inc. - Irvine CA

International Classification:

G02F 1/225
G02F 1/21

Abstract:

An optical modulator includes a Mach-Zehnder interferometer including (i) a first optical waveguide including a first semiconductor junction diode, and (ii) a second optical waveguide including a second semiconductor junction diode. A semiconductor region connects the first and second semiconductor junction diodes such that a distance between the first and second optical waveguides is less than 2.0 μm for at least a portion of a longitudinal direction of the optical modulator. In another aspect, a method of modulating an optical signal includes splitting input light into first and second optical transmission paths; modulating a phase difference between light in the first optical transmission path and light in the second optical transmission path without applying a bias voltage through an impedance less than 100 ohm between the first and second optical transmission paths; and combining light that is output from the first and second optical transmission paths.

US Patent:

20230097053, Mar 30, 2023

Filed:

Sep 24, 2021

Appl. No.:

17/485215

Inventors:

- Irvine CA, US
Christopher R. Doerr - Irvine CA, US

Assignee:

Aloe Semiconductor Inc. - Irvine CA

International Classification:

H04B 10/50
H04B 10/556
H04B 10/61

Abstract:

A 2×2 optical multi-input-multi-output (MIMO) demultiplexer is disclosed. A first optical phase shifter applies a first relative phase shift between a first pair of optical transmission paths that are received from MIMO inputs, and a first 2×2 optical coupler combines the first pair of optical transmission paths and outputs a second pair of optical transmission paths. A second optical phase shifter applies a second relative phase shift between the second pair of optical transmission paths, and a second 2×2 optical coupler combines the second pair of optical transmission paths and outputs a third pair of optical transmission paths. A third optical phase shifter applies a third relative phase shift between the third pair of optical transmission paths, and a third 2×2 optical coupler combines the third pair of optical transmission paths and outputs a fourth pair of optical transmission paths, which are output by a pair of MIMO outputs.