US Patent Issued to Nokia Solutions and Networks on July 28 for "Wavelength division multiplexing receiver" (French Inventors)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,693,555, issued on July 28, was assigned to Nokia Solutions and Networks Oy (Espoo, Finland).

"Wavelength division multiplexing receiver" was invented by Joan Manel Ramirez (Bures-sur-Yvette, France) and Claire Besancon (Paris).

According to the abstract* released by the U.S. Patent & Trademark Office: "A demultiplexer-free wavelength division multiplexing receiver based on cascaded-bandgap waveguide photodiodes, includes a substrate; and a plurality of different absorbing material sections forming a plurality of independent photodetector sections, each with a different thickness and a different bandgap. The plurality of photodetector sections may be fabricated at the same time on th...