USA as Represented by Secretary of the Navy

Yifei Li

Tariq Manzur

A device for measuring electromagnetic properties of a target includes a stage capable of holding, rotating, and translating the target. A mirror is provided that can be laterally translated. A light source provides a light signal that a splitter splits onto a reference path and a target path. The light signal on the target path is collimated and shines on the target, and the light signal on the mirror path is collimated and shines on the mirror. Reflected light from the target and the mirror is provided to an optical coupler. The optical coupler combines the light and provides output a signal processor. The signal processor computes electromagnetic properties of the target from the combined optical signal.

Near-IR emulator for complex electromagnetic structures

An optically biased photonic link receives a radio frequency (RF) signal and includes a signal laser joined to an optical intensity modulator. A low noise amplifier receives the RF signal and provides an amplified signal to the modulator. The modulator converts the signal into an optical signal. The amplifier and modulator are powered by a photovoltaic array. The array receives power from a remotely located power laser. The optical signal is received by a link receiver which provides an analysis signal and an output signal. A bias logic circuit uses the analysis signal to provide an optical bias signal to an optical detector joined to modulator. The optical detector provides a responsive bias voltage to the modulator.

Isolated photonic transmitter and detector

An active optical modulator receives a radio frequency signal and provides an intensity modulated optical signal. The optical modulator is formed on a substrate having a doped region. An interferometer is formed on the substrate having a first path and a second path. A low noise amplifier receives the radio frequency signal and provides an electrical field to the paths. A signal laser provides an optical signal to the interferometer which is modulated and interfered to produce an intensity modulated optical signal. A pump laser provides an optical gain signal to the interferometer where it adds gain to the optical signal in the interferometer by interaction with the doped region of the substrate.

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East Walpole, MA, United States of America

Yifei Li