Back to results
US 10,871,662 B2Granted
Linearization and reduction of modulated optical insertion loss for quadrature optical modulator
AssigneeII-Vi Delaware, Inc.
InventorsSuhas P. Bhandare, Daniel Mahgerefteh
Life of this patent
Estimating the term…
Abstract
An optical Mach-Zehnder superstructure modulator and method that can simultaneously linearize in-phase and quadrature components of optically modulated optical signals and reduce the modulated optical insertion loss (MOIL) by in-phase addition of the in-phase and quadrature components of an amplitude and/or phase modulated optical signal using two high-speed phase modulators embedded in the optical Mach-Zehnder superstructure modulator.
Claims21
A method of modulating an optical Mach-Zehnder superstructure modulator, the method comprising:
- a) applying a first modulation signal to a first child Mach-Zehnder interferometric modulator positioned in a first arm of the optical Mach-Zehnder superstructure modulator to impart a first modulation phase on a first optical signal;
- b) applying a second modulation signal to a second child Mach-Zehnder interferometric modulator positioned in a second arm of the optical Mach-Zehnder superstructure modulator to impart a second modulation phase on a second optical signal;
- c) phase shifting the first optical signal by applying a first AC bias signal to the first arm of the optical Mach-Zehnder superstructure;
- d) phase shifting the second optical signal by applying a second AC bias signal to the second arm of the optical Mach-Zehnder superstructure;
- and
- e) interferometically combining the first optical signal and the second optical signal to generate an output optical signal at an output,
- wherein at least one of the first and second AC bias signal is a function of at least one of the first and second modulation signal.
4 more elements
Dependencies are inferred from the claim text.