The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 2022
Filed:
Apr. 09, 2020
The Chinese University of Hong Kong, Hong Kong, CN;
Hon Ki Tsang, Hong Kong, CN;
Yeyu Tong, Tongcheng, CN;
The Chinese University of Hong Kong, Hong Kong, CN;
Abstract
We describe a high coupling-efficiency waveguide grating coupler for use in the optical interface between a planar multimode waveguide and a multimode optical fiber in mode division multiplexed optical communication systems. The multimode waveguide grating coupler can launch light from the different modes of the planar waveguide into the different modes of the multimode optical fiber and vice-versa. A silicon based multimode waveguide grating coupler was used to couple two polarizations of a multimode silicon waveguide into the LP01 mode and LP11 mode from a step index multi-mode fiber (MMF). Simulations of the preliminary design predicted the coupling efficiency to be −4.3 dB for LP01 mode and −5.0 dB for the LP11 mode. Experimental coupling efficiency of −4.9 dB and −6.1 dB were obtained for LP01 and LP11, respectively. The multiplexer can be passive.