Company Filing History:
Years Active: 2004-2005
Title: Innovations of Won Jin Choi
Introduction
Won Jin Choi is an accomplished inventor based in Allentown, PA (US). He has made significant contributions to the field of electroabsorption modulators, holding a total of 2 patents. His work focuses on advanced optical devices that enhance communication technologies.
Latest Patents
Choi's latest patents include a "Method of fabricating a monolithic expanded beam mode electroabsorption modulator." This innovative method involves the manufacturing of a monolithic expanded beam mode electroabsorption modulator that features a waveguide layer with two expansion/contraction sections and an electroabsorption section arranged along a longitudinal axis. The process includes forming at least one patterned growth retarding layer on the substrate's top surface. The waveguide layer is created through selective area growth, possessing a different index of refraction than the substrate. Additionally, the electroabsorption portion of the waveguide layer has a greater thickness compared to its other sections. The semiconductor layer is then formed on the waveguide layer, which also has a different index of refraction. The design allows for the formation of electrical contacts that are crucial for the device's functionality.
Another notable patent is the "Monolithic expanded beam mode electroabsorption modulator." This device comprises a substrate, a waveguide layer coupled to the substrate's top surface, and a semiconductor layer connected to the waveguide layer. It features first and second electrodes that receive electric signals, which are coupled to the substrate and the semiconductor layer, respectively. The waveguide layer consists of multiple sublayers that form a quantum well structure, responsive to the electric signal. The design includes two expansion/contraction sections and an active section, which is positioned between the two expansion/contraction sections.
Career Highlights
Choi is currently employed at T-Networks, Inc., where he continues to innovate in the field of optical devices. His work has been instrumental in advancing technologies that rely on electroabsorption modulation.
Collaborations
Choi collaborates with talented individuals such as Aaron Bond and Ram Jambunathan, contributing to a dynamic work environment that fosters innovation.
Conclusion
Won Jin Choi's contributions to the field of electroabsorption modulators highlight his expertise and commitment to advancing optical technologies. His patents reflect a deep understanding of the complexities involved in manufacturing cutting-edge devices.