US Patent Issued to HAMAMATSU PHOTONICS on Feb. 10 for "Quantum cascade laser element and quantum cascade laser device" (Japanese Inventors)

ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,548,982, issued on Feb. 10, was assigned to HAMAMATSU PHOTONICS K.K. (Hamamatsu, Japan).

"Quantum cascade laser element and quantum cascade laser device" was invented by Atsushi Sugiyama (Hamamatsu, Japan), Tadataka Edamura (Hamamatsu, Japan) and Naota Akikusa (Hamamatsu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A quantum-cascade laser element includes: a semiconductor substrate; a semiconductor mesa formed on the semiconductor substrate to include an active layer having a quantum-cascade structure and to extend along a light waveguide direction; an embedding layer formed to interpose the semiconductor mesa along a width direction of the sem...