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. 18, 2025
Filed:
Apr. 12, 2023
Huawei Technologies Co., Ltd., Shenzhen, CN;
HUAWEI TECHNOLOGIES CO., LTD., Shenzhen, CN;
Abstract
A laser chip includes a first power detector, a first controller, an optical splitter, a polarization splitter-rotator, a bandpass filter, and a slave laser. The optical splitter includes a first, a second, and a third port. The first port is configured to receive injection light of a master laser. The second port is connected to the first power detector. The optical splitter is configured such that the injection light enters the optical splitter through the first port, and is output to the polarization splitter-rotator through the third port. The polarization splitter-rotator is configured to perform optical splitting and polarization conversion on the injection light. The polarization splitter-rotator includes a first waveguide configured to transmit TE mode injection light after the injection light is split by the polarization splitter-rotator, and a second waveguide configured to transmit TM mode injection light after the injection light is split by the polarization splitter-rotator.