Chunhui Xu

Title: The Innovations of Chunhui Xu

Introduction

Chunhui Xu is a prominent inventor based in Piscataway, NJ (US), known for his significant contributions to optical communication systems. With a total of 11 patents to his name, Xu has made remarkable advancements in the field, particularly in performance monitoring and modulation techniques.

Latest Patents

One of Xu's latest patents focuses on performance monitoring in an optical communication system. This invention involves an optical performance monitor (OPM) designed to characterize impairments in optical signals modulated with data. The OPM utilizes an optical autocorrelator to sample the autocorrelation function of the optical signal, employing two-photon absorption. By analyzing autocorrelation points at various bit delays, the OPM can detect and quantify issues such as loss of data modulation, signal contrast, pulse broadening, peak power fluctuations, timing jitter, and deviations from the pseudo-random character of data. Additionally, the OPM can perform Fourier transformation based on these autocorrelation points to obtain spectral components, which help in identifying chromatic dispersion, polarization mode dispersion, and misalignment of pulse carvers and data modulators. The OPM is also capable of generating feedback to network operators to enhance network performance.

Another notable patent by Xu addresses modulation phase shift to compensate for optical passband shift in optical components, such as optical demultiplexers. This technique involves using a broadband source coupled to a dispersive element to generate a chirped pulsed optical signal. Data is modulated onto specific wavelengths of this signal, which is then transmitted to a downstream optical demultiplexer. The feedback signal from the demultiplexer is utilized to phase shift the modulator, effectively adjusting the wavelength of the data modulation to align with the passband centers of the demultiplexer.

Career Highlights

Chunhui Xu has worked with notable companies in the telecommunications industry, including Lucent Technologies Inc. and Agere Systems Inc. His experience in these organizations has contributed to his expertise in optical communication technologies.

Collaborations

Throughout his career, Xu has collaborated with talented individuals such as Xiang Liu and Wayne Harvey Knox, further enhancing his innovative work in the field.

Conclusion

Chunhui Xu's contributions to optical communication systems through his patents and collaborations highlight his role as a leading inventor in the industry. His work continues to influence advancements in technology and improve