Company Filing History:
8 out of 18 
4 out of 1,012 
3 out of 832,680 Years Active: 1999-2008
Title: Innovations of Jian-Jun He: A Pioneer in Semiconductor Laser Technology
Introduction
Jian-Jun He is a prominent inventor based in Ottawa, Canada, known for his significant contributions to the field of semiconductor laser technology. With a total of 15 patents to his name, He has made remarkable advancements that have implications for various applications in optics and telecommunications.
Latest Patents
One of Jian-Jun He's latest patents is the Q-modulated semiconductor laser. This innovative design features an optical gain section and an electro-absorptive modulator section, separated by a vertically etched air gap that acts as a partially reflecting mirror. The modulator section is strategically placed inside an anti-resonant Fabry-Perot cavity, functioning as the rear reflector of the laser. The absorption coefficient change in the modulator section leads to variations in the Q-factor of the laser, affecting the lasing threshold and output power. This integrated Q-modulated laser boasts advantages such as high speed, high extinction ratio, low wavelength chirp, and cost-effectiveness.
Another notable invention is the V-coupled-cavity semiconductor laser. This design consists of two optical cavities, each with an optical waveguide bounded by partially reflecting elements. The cavities are arranged in a V-shaped geometry, ensuring minimal cross-coupling at the open end while allowing predetermined cross-coupling at the closed end. This configuration optimizes single-mode selectivity. The first cavity's length corresponds to a set of discrete operating channels, while the second cavity is slightly adjusted to ensure that only one resonant wavelength aligns with the first cavity's resonant wavelengths. This innovative approach allows for wavelength switching among discrete operating wavelengths.
Career Highlights
Throughout his career, Jian-Jun He has worked with notable organizations such as Metrophotonics Inc. and the National Research Council of Canada. His work in these institutions has furthered the development of advanced laser technologies and has contributed to the growth of the field.
Collaborations
Jian-Jun He has collaborated with esteemed colleagues, including Emil S. Koteles and Orazio Berolo. These partnerships have fostered innovation and have led to the successful development of cutting-edge technologies in semiconductor lasers.
Conclusion
Jian-Jun He stands out as a leading inventor in the realm of semiconductor laser technology. His innovative patents and collaborations have significantly impacted the field, paving the way for future advancements. His
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