Company Filing History:
Years Active: 1998-2001
Title: Alfred Douglas Stone: Innovator in Semiconductor Laser Technologies
Introduction
Alfred Douglas Stone, an accomplished inventor based in North Haven, CT, has made significant contributions to the field of laser technology through his innovative designs and patents. With a total of four patents to his name, Stone's work focuses on advancing semiconductor lasers that operate in librational modes, enhancing both efficiency and output power.
Latest Patents
One of Stone’s latest patents is for a “Semiconductor laser for operation in librational modes.” This invention features a solid-state laser consisting of a cavity resonator with a generally cylindrical body, housing an active region that generates lasing light when appropriately pumped. The resonator is uniquely designed with a high effective refractive index (n>2, typically n>3) and is shaped to support librational modes, such as a preferred bow-tie mode. This design, which includes a Group III-V compound semiconductor, provides a significant enhancement in optical output power—up to three orders of magnitude greater than conventional circularly symmetric resonators.
Another significant patent from Stone is the “Asymmetric resonant optical cavity apparatus.” This invention employs an optically transmissive dielectric material to construct an oval cross-section cavity that optimally couples an optical signal into the cavity. The design ensures that the optical energy emitted avoids producing physically separated beams, effectively optimizing performance for various applications.
Career Highlights
Alfred Douglas Stone has worked with renowned institutions, gaining practical experience and advancing his research. Notably, he has been associated with Yale University and Lucent Technologies Inc., where he applied his knowledge in innovative environments that encouraged exploration and creativity in laser technology.
Collaborations
Throughout his career, Stone has collaborated with esteemed colleagues, including Jens Uwe Noeckel and Federico Capasso. These partnerships have likely enriched his inventions and advanced the study of semiconductor and optical technologies, leading to breakthroughs in their respective fields.
Conclusion
Alfred Douglas Stone stands out as a pioneering inventor whose contributions to semiconductor laser technology are noteworthy. His patents reflect a deep understanding of optical physics and the practical implications of laser technology, positioning him as a significant figure in the innovation landscape. As advancements continue in this field, Stone's work will undoubtedly inspire future generations of inventors and researchers alike.