US Patent Issued to Nokia Solutions and Networks on March 24 for "Distributed feedback laser with complex coupling" (French Inventors)

ALEXANDRIA, Va., March 24 -- United States Patent no. 12,586,985, issued on March 24, was assigned to Nokia Solutions and Networks Oy (Espoo, Finland).

"Distributed feedback laser with complex coupling" was invented by Alexandre Garreau (Antony, France) and Jean Francois Paret (Arpajon, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "A distributed feedback laser (DFB) is a type of laser diode in which the active region of the device contains a periodically structured element or diffraction grating, which may include periodic changes in refractive index that cause reflection back into the laser cavity. Conventional DFB lasers used in optical networks may exploit either loss-modulated or index-modulated ...