US Patent Issued to FOCUSLIGHT TECHNOLOGIES on Sept. 30 for "Wavelength division multiplexing device having wavelength division multiplexing filter" (Chinese, American Inventors)

ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,431,979, issued on Sept. 30, was assigned to FOCUSLIGHT TECHNOLOGIES INC. (Xi'an, China).

"Wavelength division multiplexing device having wavelength division multiplexing filter" was invented by Chun He (Fremont, Calif.), Lei Gao (Xi'an, China) and Xingsheng Liu (Xi'an, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical multiplexing system comprises a wavelength division multiplexing (WDM) device, an incoming light input to the WDM device, and an exiting light output from the WDM device. The WDM device comprises a WDM filter, an incident light is incident at the WDM filter having an incident angle at the WDM filter. The incident light is p...