Julius Goldhar

Title: Innovations of Julius Goldhar

Introduction

Julius Goldhar is a notable inventor based in Silver Spring, MD, with a significant contribution to the field of optical technology. He holds three patents that showcase his expertise in optical clock recovery and regeneration techniques. His work has implications for high-speed data transmission and optical communication systems.

Latest Patents

Goldhar's latest patents include an "Optical clock recovery device using non-linear optical waveguides." This invention focuses on all-optical timing extraction and optical clock recovery for high-speed return-to-zero binary optical data streams. It utilizes the timing difference between clock and data counter-propagating optical pulses in a non-linear optical waveguide. The first pulse arriving at the waveguide partially saturates its transmission properties, leading to a change in the transmission characteristics for the lagging pulse. A balanced photo-detector compares the peak power of the clock and data pulses, generating an error signal for synchronization.

Another significant patent is for "All-optical regeneration at high bit rates using an electroabsorption modulator." This invention enables simultaneous all-optical regeneration and wavelength conversion using a reverse-biased electroabsorption modulator. The modulator reshapes degraded input data by selectively absorbing optical noise, thus enhancing the signal-to-noise ratio. This technology achieved error-free wavelength conversion and regeneration at 20 Gb/s, improving receiver sensitivity significantly.

Career Highlights

Goldhar has worked with prestigious organizations, including the National Security Agency and the University System of Maryland. His experience in these institutions has allowed him to develop cutting-edge technologies that advance optical communication.

Collaborations

Some of his notable coworkers include Pak Shing Cho and Daniel Mahgerefteh, who have contributed to his research and development efforts.

Conclusion

Julius Goldhar's innovations in optical technology have made a significant impact on the field of data transmission and communication. His patents reflect a deep understanding of optical systems and their applications in modern technology.