James Douglas Franklin

Title: The Innovative Contributions of James Douglas Franklin

Introduction

James Douglas Franklin is a notable inventor based in Manhattan Beach, CA. He has made significant contributions to the field of optical communication, holding a total of 12 patents. His work focuses on advanced technologies that enhance communication systems, particularly in spaceborne applications.

Latest Patents

One of Franklin's latest patents is the "Optical high-power amplifier circuit with switchable polarized output state." This invention is designed for spaceborne satellite-based communication networks. It includes fiberoptic gain and polarization maintenance stages, a polarization splitter, first and second photodetectors, and an electronic control unit. The gain stage outputs an amplified optical signal in response to a low-power optical input signal. The polarization maintenance stage outputs separate high and low power output signals based on the amplified signal. A majority of the power of the input signal is allocated to the high-power output signal. The polarization splitter transmits the low-power output signal along the slow and/or fast polarization axis. The photodetectors are arranged on the slow and fast axes. The electronic control unit outputs a polarizer control signal to a polarization rotator device, commanding it to output the low-power optical input signal with a targeted polarized output state.

Another significant patent is related to "Optical communication using double sideband suppressed carrier demodulation." This method involves receiving a double sideband suppressed carrier optical signal and passing it through a Costas loop circuit. The process includes outputting a radio frequency signal from a quadrature port of the Costas loop circuit, enhancing the efficiency of optical demodulation.

Career Highlights

Throughout his career, Franklin has worked with prominent companies, including The Boeing Company. His expertise in optical technologies has positioned him as a key player in the development of advanced communication systems.

Collaborations

Franklin has collaborated with notable individuals in his field, including Leon Marmorshteyn and Bernard E Dathe. These collaborations have contributed to the advancement of his innovative projects and patents.

Conclusion

James Douglas Franklin's contributions to optical communication technology are significant and impactful. His inventions continue to shape the future of communication systems, particularly in spaceborne applications.