US Patent Issued to EXFO on Sept. 8 for "Method and apparatus of distributed acoustic sensing" (Canadian Inventors)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,730,238, issued on Sept. 8, was assigned to EXFO Inc. (Quebec, Canada).

"Method and apparatus of distributed acoustic sensing" was invented by Hongxin Chen (Montreal) and Normand Cyr (Quebec, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided a method and an apparatus of fiber optic distributed acoustic sensing (DAS) which use a simple, reliable and robust signal processing for amplitude-based DAS measurements. 1) The lack of linearity of the amplitude-based DAS measurements (due to its unpredictable variation of the transfer function along the fiber) can be improved by normalizing the amplitude vs distance using an amplitude-normal...