Location History:
- Columbia, MD (US) (2003 - 2005)
- Clarksville, MD (US) (2005 - 2008)
Company Filing History:
7 out of 23 
1 out of 1 
1 out of 69 
Years Active: 2003-2008
Title: The Innovations of William Shieh
Introduction
William Shieh is a prominent inventor based in Columbia, MD, known for his significant contributions to optical technology. With a total of 10 patents to his name, he has made remarkable advancements in the field of optical amplification and signal processing.
Latest Patents
One of his latest patents is titled "Device and method for reducing pump laser instability due to amplified Rayleigh scattering feedback." This invention focuses on a device and method designed to minimize amplified Rayleigh backscatter at a Raman pump. The pump assembly for an optical amplifier includes a set of pump radiation sources that are essential for Raman pumping an optical transmission span. Each source is engineered to produce radiation with specific pump wavelengths and power levels. The optical transmission span is tailored to provide Raman amplification of an optical data signal when energized by the set of pump radiation sources. Additionally, at least one optical isolator is strategically placed between the selected pump radiation source and the optical transmission span to mitigate the risk of amplified Rayleigh backscatter feeding back into the pump source.
Another notable patent is "Methods of signal substitution for maintenance of amplifier saturation." This method is crucial for maintaining amplifier saturation in a wavelength division multiplexed (WDM) optical network. The network comprises multiple sub-bands, each containing at least two signal channels that carry distinct data signals. The method involves identifying signal channels with predetermined characteristics within each sub-band. A substitute signal transmitter is activated if the corresponding sub-band contains a specific number of signal channels exhibiting the predetermined characteristic. The data signals and substitute signals are then combined into a WDM signal for transmission over optical fiber.
Career Highlights
Throughout his career, William Shieh has worked with several innovative companies, including Dorsal Networks, Inc. and Sowilo Networks, Inc. His work has significantly impacted the development of optical technologies and their applications in modern communication systems.
Collaborations
William has collaborated with notable professionals in the field, including Vladimir Petricevic and Thomas R Clark, Jr. These collaborations have further enhanced his contributions to optical technology.
Conclusion
William Shieh's innovative work in optical technology and his numerous patents highlight his expertise and dedication to advancing the field. His inventions continue to influence the development of optical communication systems, showcasing the importance of innovation in technology.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.