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We demonstrate a fully integrated extended distributed Bragg reflector (DBR) laser with ∼1 kHz linewidth and over 37 mW output power, as well as a ring-assisted DBR laser with less than 500 Hz linewidth. The extended DBR lasers are fabricated by heterogeneously integrating III-V material on Si as a gain section plus a 15 mm long, low-kappa Bragg grating reflector in an ultralow-loss silicon waveguide.

"The National Academy of Inventors and the Intellectual Property Owners Association have announced their seventh annual report on trends within academic patenting. The Top 100 Worldwide Universities Granted U.S. Utility Patents in 2018 has been announced by the National Academy of Inventors (NAI) and the Intellectual Property Owners Association (IPO). The report is created using data from the U.S. Patent and Trademark Office (USPTO), and it highlights the vital role patents play in university research and innovation."