ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,494,619, issued on Dec. 9, was assigned to II-VI DELAWARE INC. (Wilmington, Del.).
"DFB with weak optical feedback" was invented by Yasuhiro Matsui (Milpitas, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A distributed feedback plus reflection (DFB+R) laser includes an active section, a passive section, a low reflection (LR) mirror, and an etalon. The active section includes a distributed feedback (DFB) grating and is configured to operate in a lasing mode. The passive section is coupled end to end with the active section. The LR mirror is formed on or in the passive section. The etalon includes a portion of the DFB grating, the passive section, ...