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:
Nov. 19, 2019
Filed:
Jul. 06, 2017
Macom Technology Solutions Holdings, Inc., Lowell, MA (US);
Haruhisa Soda, Hachioji, JP;
MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC., Lowell, MA (US);
Abstract
A wavelength locker includes first and second waveguides to guide light. The wavelength locker also includes a multimode interference (MMI) coupler having a number of inputs and outputs. First and second inputs of the MMI coupler are coupled to outputs of the first and second waveguides. The MMI coupler merges light from the first and second waveguides to generate an interference pattern of light. The MMI coupler then outputs a plurality of phase shifted versions of the interference pattern. The wavelength locker also includes an interference pattern selector configured to receive signals corresponding, respectively, to light output from the outputs of the MMI coupler. The interference pattern selector is also configured to select one or more outputs of the MMI coupler based on power levels of the interference patterns output from the MMI coupler and a predetermined frequency of a telecommunications frequency grid.