Company Filing History:
2 out of 3,345 
1 out of 745 
1 out of 386 
Years Active: 1988-1991
Title: Israel Bar-Joseph: Innovator in Semiconductor Technology
Introduction
Israel Bar-Joseph is a notable inventor based in Highlands, NJ (US), recognized for his contributions to semiconductor technology. He holds a total of 3 patents, showcasing his innovative approach to enhancing the performance of semiconductor devices.
Latest Patents
One of his latest patents involves a semiconductor device that includes cascaded modulation-doped quantum wells. This invention aims to achieve high-speed operation while allowing significant changes in the index of refraction or absorption coefficient for modulating lightwave signals. The design ensures that each modulation-doped quantum well heterostructure exhibits substantially equal boundary conditions in an unbiased state, which is crucial for efficient cascading. Additionally, each quantum well is paired with a barrier layer to minimize leakage current, contributing to the overall speed of the structure. When integrated into a waveguide, these heterostructures can function as external modulators, intra-cavity wavelength tuning elements, or even as optically-pumped lasers.
Another significant patent focuses on wavelength conversion using self electrooptic effect devices. This technology allows information carried by an optical signal at one wavelength to be transferred intact to another optical signal at a different wavelength. The optoelectronic circuit designed for this purpose employs quantum well devices connected serially, facilitating self electrooptic effects. This circuit can accept two input signals and provide two output signals, enabling bidirectional information transfer with wavelength conversion.
Career Highlights
Throughout his career, Israel Bar-Joseph has worked with prestigious organizations such as AT&T Bell Laboratories and American Telephone & Telegraph Company. His work at these institutions has significantly influenced the field of semiconductor technology.
Collaborations
He has collaborated with notable colleagues, including Daniel S. Chemla and Tao-Yuan Chang, contributing to advancements in their respective fields.
Conclusion
Israel Bar-Joseph's innovative work in semiconductor technology and his patents reflect his commitment to advancing the field. His contributions continue to influence the development of high-speed optical communication systems.