Shoude Chang

Title: Shoude Chang: Innovator in Coherent Comb Laser Technology

Introduction

Shoude Chang is a prominent inventor based in Ottawa, Canada. He has made significant contributions to the field of laser technology, particularly in the development of coherent comb lasers. With a total of 9 patents to his name, Chang's work has advanced the understanding and application of laser systems.

Latest Patents

One of Chang's latest patents focuses on the stable linewidth narrowing of a coherent comb laser. This innovative technique involves providing a mode-locked semiconductor coherent comb laser (CCL) that outputs at least four mode-locked lines. The process includes tapping a fraction of the power from the CCL to form a tapped beam, which is then propagated to an attenuator to produce an attenuated beam. The reinsertion of this attenuated beam into the laser cavity allows the CCL to operate with mode-locked lines, each exhibiting a linewidth of less than 80% of the original linewidth. By utilizing a solid waveguide and ensuring that the secondary cavity is polarization maintaining, improved stability of the linewidth narrowing is achieved.

Career Highlights

Shoude Chang is currently affiliated with the National Research Council of Canada, where he continues to push the boundaries of laser technology. His work has not only contributed to academic knowledge but has also had practical implications in various industries.

Collaborations

Chang has collaborated with notable colleagues, including Ming Zhou and Costel Flueraru. These partnerships have fostered a collaborative environment that enhances innovation and research in laser technology.

Conclusion

Shoude Chang's contributions to coherent comb laser technology exemplify the impact of innovative thinking in the field of optics. His patents and ongoing research continue to shape the future of laser applications.