Lockheed Martin Corporation

John C Ceccherelli

Paul T Coyne

Andrew F Schaefer

Stephen V Robertson

Kathryn P Guy

James E Bishop

Patrick S Ryan

Daniel S Parsons

A system, method, and device for RF upconversion. The system can include a laser, two EAMs, a photonic filter, a photonic service filter, two photodiodes, and a mixer. The first EAM can convert a received RF signal into the photonic domain by modulating an optical signal (received from the laser) based on the received RF signal to output a modulated optical signal. The photonic filter can output a filtered optical signal based on the modulated optical signal to the first photodiode which can output a filtered RF signal in the RF domain. The second EAM can output an LO modulated optical signal based on a received LO to the service filter which can output a filtered LO optical signal to the second photodiode which can output a filtered LO signal in the RF domain. The mixer can mix the filtered RF and LO signals to generate an IF signal.

Systems, devices, and methods for photonic to radio frequency conversion

The disclosure is directed to systems and methods for collision avoidance of aerial vehicles. More particularly, the disclosure is directed to systems and methods for avoiding collisions between manned aerial vehicles and unmanned aerial vehicles. The unmanned aerial vehicle includes a low power RF beacon which transmits signals over a predefined frequency monitored by manned aerial vehicles.

Collision avoidance systems

Systems, devices, and methods for photonic to radio frequency downconversion

A system and method for adaptive equalization in a communication system. The system can include a modulator, a processor coupled to the modulator, and a memory coupled to the processor. The memory can store software instructions that, when executed by the processor, cause the processor to perform operations that can include generating, for each of one or more scan frequencies of interest, an optimal bias setting of the modulator. Data indicating a selection of a range of frequencies to be processed by the communication system can be received at the processor. The operations can include determining, responsive to the receiving, the optimal bias setting corresponding to the selected range of frequencies. A bias of the modulator can be adjusted based on the determined optimal bias setting, the adjusting providing adaptive equalization of the flatness response of the communication system.

Electro-absorption modulator adaptive equalizer systems and methods

A system, method, and device for efficiently maintaining a stable operational temperature for precise operation of a laser. The system can include an ambient temperature sensor, a cooler controller adapted to control a cooler having an adjustable setpoint, a processor, and a memory coupled to the processor. The memory can store software instructions that, when executed by the processor, cause the processor to perform operations that can include receiving data from the sensor and determining the ambient temperature based on the received data. The determined ambient temperature can be compared to a current setpoint. When the delta exceeds a predetermined threshold, the setpoint can be adjusted to enable the operating environment of the laser to reach a control temperature closer to ambient conditions (and within a predetermined operating temperature range of the laser). Adjusted setpoint data can be transmitted to the cooler controller to adjust the setpoint of the cooler.

Systems and methods for adaptively controlling a thermoelectric cooler

A system, method, and device for RF upconversion is provided. The system can include a laser, a local oscillator, and an RF mixer, an EAM, a photonic filter, and a photodiode. The mixer can receive an LO signal from the local oscillator. The mixer can be configured to mix LO with an IF signal and output a mixed signal. The EAM can receive an optical signal from the laser, receive the mixed signal from the mixer, and be configured to convert the mixed signal into the photonic domain by modulating the optical signal based on the mixed signal to output a modulated optical signal. The photonic filter can receive the modulated optical signal and can be configured to output a filtered optical signal. The photodiode can receive the filtered optical signal and can be configured to convert the filtered optical signal into the RF domain to output upconverted RF output.

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Owego, NY, United States of America

John C Ceccherelli