Company Filing History:
Years Active: 2016-2019
Title: Innovations of Purnawirman Purnawirman in Photonic Devices
Introduction
Purnawirman Purnawirman is an accomplished inventor based in Watertown, MA (US). He has made significant contributions to the field of photonic devices, holding a total of 3 patents. His work focuses on the development of integrated erbium-doped waveguide lasers designed for silicon photonic systems.
Latest Patents
Purnawirman’s latest patents include innovative methods for using and making photonic devices. These inventions feature laser cavities defined by distributed Bragg reflectors (DBRs) formed in silicon nitride-based waveguides. The DBRs incorporate grating features defined by wafer-scale immersion lithography, with an upper layer of erbium-doped aluminum oxide deposited as the final step in the fabrication process. The resulting inverted ridge-waveguide achieves high optical intensity overlap with the active medium for both the 980 nm pump (89%) and 1.5 µm laser (87%) wavelengths. The pump-laser intensity overlap exceeds 93%, and the output powers can reach 5 mW or higher. These devices demonstrate lasing at widely-spaced wavelengths within both the C- and L-bands of the erbium gain spectrum, specifically at 1536, 1561, and 1596 nm.
Career Highlights
Purnawirman is affiliated with the Massachusetts Institute of Technology, where he continues to advance his research in photonics. His work has garnered attention for its potential applications in various technological fields.
Collaborations
Purnawirman collaborates with notable colleagues, including Michael Robert Watts and Ehsan Shah Hosseini. Their combined expertise contributes to the innovative research and development of photonic technologies.
Conclusion
Purnawirman Purnawirman is a leading figure in the field of photonic devices, with a focus on integrated erbium-doped waveguide lasers. His contributions are paving the way for advancements in silicon photonic systems, showcasing the importance of innovation in this rapidly evolving field.