Kai H Chang

Title: Innovations by Inventor Kai H Chang

Introduction

Kai H Chang is a notable inventor based in Suwanee, GA (US). He has made significant contributions to the field of optical fiber technology, holding a total of 4 patents. His work focuses on improving the performance and reliability of optical fibers, which are essential for modern communication systems.

Latest Patents

One of his latest patents is a method for fabricating optical fiber using deuterium exposure. This innovative method aims to create optical fibers with reduced aging or hydrogen aging loss over their lifespan. By improving silicon-oxygen stoichiometry during preform manufacturing, the method minimizes the generation of silicon defects in the optical fiber preform. Additionally, deuterium exposure helps reduce atomic defects that can attract hydrogen atoms, leading to increased water absorption loss. The resulting optical fibers exhibit improved transmission characteristics, with a transmission loss at 1385 nanometers of less than 0.33 dB/km and an aging loss increase of less than 0.04 dB/km.

Another significant patent by Chang addresses the method of making optical fiber with reduced E-band and L-band loss peaks. He discovered narrow loss peaks at wavelengths of 1440 nm, 1583 nm, and 1614 nm, which can disrupt transmission channels in amplified DWDM systems. The solution involves fabricating optical fibers that are essentially free of carbon contamination, achieved by eliminating carbon-containing reagents during the preform and tube-making processes.

Career Highlights

Throughout his career, Kai H Chang has worked with prominent companies in the telecommunications industry, including Fitel USA Corporation and Lucent Technologies Inc. His expertise in optical fiber technology has positioned him as a key figure in advancing communication systems.

Collaborations

Chang has collaborated with notable professionals in his field, including David Kalish and Thomas John Miller. These collaborations have contributed to the development of innovative solutions in optical fiber technology.

Conclusion

Kai H Chang's contributions to optical fiber technology through his patents and career achievements highlight his role as an influential inventor. His work continues to impact the telecommunications industry, enhancing the performance and reliability of optical communication systems.