Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A power supply control circuit for conditioning an electronic circuit's input voltage at ground or at the operation voltage of an external power supply so as to permit the electronic circuit to receive a supply voltage at ground potential until the power supply transitions above a threshold voltage level and thereafter to provide operation level voltage of the power supply to the electronic circuit. The circuit comprises a transconducting means having its high current node coupled to an external power supply, its controlling node coupled to a voltage reference means. The transconducting means has its controlled high current node coupled through a power input node to the power input for the electronic circuit to condition the voltage received thereby. The power input node is in turn coupled through a pull down means to ground potential.

Abstract: A method and apparatus for sequencing the operation of electronic circuits based upon the level of the voltage provided by an external power supply. One or more power supply sequencer circuits may be interposed between an external power supply and one or more electronic circuits. The power supply sequencer circuits comprise a transistor having its high current node coupled to an external power supply, its controlling node coupled to a voltage sequencing means such as a diode and a resistor, wherein the resistor is in turn coupled to the external power supply and the diode is coupled to the ground potential. The transistor has its controlled high current node coupled through a power input node to the power input for the electronic circuit to condition the voltage received thereby. The power input node is in turn coupled through a second resistor to ground potential.

Abstract: A system and method of providing a temperature compensated line termination for a high speed communications bus meeting military standards specifications. A temperature compensating device exhibiting a negative temperature coefficient of resistance is connected between a power supply and the communications bus drives. In a preferred embodiment, a P-N junction in series with a Schottky diode is placed between a 3.3 volt supply and the communications bus drive modules.