Washington University

Ii-Vi Delaware, Inc.

Faraz Monifi

Lan Yang

Sahin Kaya Ozdemir

Bryan Park

Bo Peng

Daniel Mahgerefteh

Gilles P Denoyer

Dennis Pu

Homero Guimaraes

A method of transmitting at least one optical signal through an add-drop filter includes directing the at least one optical signal into a first tapered optical fiber of the add-drop filter. The add-drop filter includes an active resonator side-coupled between the first tapered optical fiber and a second tapered optical fiber, and the active resonator is doped with at least one rare earth ion. A tuned optical gain is produced by delivering a tuned amount of pump laser energy to the at least one rare earth ion at a sub-lasing level, the tuned optical gain configured to compensate an intrinsic loss of the active resonator.

Tunable add-drop filter with an active resonator

An a system and method for chaos transfer between multiple detuned signals in a resonator mediated by chaotic mechanical oscillation induced stochastic resonance where at least one signal is strong and where at least one signal is weak and where the strong and weak signal follow the same route, from periodic oscillations to quasi-periodic and finally to chaotic oscillations, as the strong signal power is increased.

Opto-mechanical system and method having chaos induced stochastic resonance and opto-mechanically mediated chaos transfer

A directional coupler may include a first waveguide and a second waveguide. The first waveguide may include an optical input port to receive an optical signal and a first output port. The second waveguide may include a terminated port and a second output port. The first and second optical waveguides may be configured to split the optical signal such that a first portion of the optical signal is directed to the first output port and a second portion of the optical signal is directed to the second output port. The first portion of the optical signal may include first substantially equal portions of a transverse magnetic (TM) polarization mode and a transverse electric (TE) polarization mode of the optical signal. The second portion of the optical signal may include second substantially equal portions of the TM polarization mode and the TE polarization mode of the optical signal.

Polarization independent directional coupler

An optical receiver with improved dynamic range may include at least one directional coupler having at least one input configured to couple to an optical fiber. The optical receiver may include a first signal path including a first photodetector coupled to an output of the at least one directional coupler, a first transimpedance amplifier (TIA) including an input coupled to the first photodetector, and an adder coupled to an output of the first TIA. The optical receiver may include a second signal path including a second photodetector coupled to an output of the at least one directional coupler, a second TIA including an input coupled to the second photodetector, and the adder coupled to an output of the second TIA. Further, the optical receiver may include an optical power sensing circuit coupled to at least one of the first TIA, the second TIA, and the adder.

Split optical front end receivers

An add-drop filter for transmitting at least one signal is provided. The add-drop filter includes at least two optical waveguides capable of carrying the at least one signal, and at least one active resonator coupled between the optical waveguides, wherein the at least one active resonator provides gain that counteracts losses for the at least one signal.

Growing community of inventors

San Diego, CA, United States of America

Faraz Monifi