Company Filing History:
Years Active: 2001-2003
Title: John deAndrea: Innovator in Laser Diode Technology
Introduction
John deAndrea is a notable inventor based in Lawrenceville, NJ (US). He has made significant contributions to the field of laser diode technology, holding 2 patents that address critical challenges in laser operation and stability.
Latest Patents
One of his latest patents is titled "Overcoming L-I kink effects in a laser diode feedback control." This invention focuses on suppressing the negative effects of kinking in the L-I characteristics of laser diode operation. The solution involves either combining the output of multiple laser diodes or applying a current modulation superimposed on the direct driving current of the laser diode. This approach, along with a limited feedback bandwidth, effectively mitigates the issues associated with laser diode current control.
Another significant patent by deAndrea is "Stabilization of laser sources with closely-coupled optical reflectors using an internal dither circuit." This apparatus provides a laser source that is optically coupled to an optical waveguide, such as an optical fiber. It features a reflective grating positioned at a distance equal to or greater than the coherence length of the laser source. This design maintains wavelength operation despite changes in operating temperature or drive current, thereby improving the stability of the laser source.
Career Highlights
Throughout his career, John deAndrea has worked with prominent companies in the industry, including SDL Inc. and JDS Uniphase Corporation. His experience in these organizations has contributed to his expertise in laser technology and innovation.
Collaborations
DeAndrea has collaborated with notable professionals in the field, including Mehrdad Ziari and Robert G. Waarts. These collaborations have further enriched his work and contributions to laser technology.
Conclusion
John deAndrea's innovative work in laser diode technology has led to significant advancements in the field. His patents reflect a deep understanding of the challenges faced in laser operation and provide effective solutions to enhance stability and performance.
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