US Patent Issued to Mitsubishi Electric on July 21 for "Semiconductor laser device" (Japanese Inventors)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,689,179, issued on July 21, was assigned to Mitsubishi Electric Corp. (Tokyo).

"Semiconductor laser device" was invented by Takeshi Yamatoya (Tokyo) and Takashi Nagira (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a semiconductor laser device in which a distributed feedback laser part and an electro-absorption modulator part are formed on the same semiconductor substrate, and laser light emitted from the laser part is emitted from an emission end face of the modulator part. The laser part includes a first diffraction grating formed to extend in a direction of an optical axis of the laser light and the modulator part partially includi...