Zhiwen CHANG

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Shenzhen, CN

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Patents Grantslast 30 patents

Information Patent Grant
Fiber amplifier and gain adjustment method for fiber amplifier
- Patent number 11,671,179
- Issue date Jun 6, 2023
- Huawei Technologies Co., Ltd.
- Yuanwu Wang
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Fiber amplifier and gain adjustment method for fiber amplifier
- Patent number 11,128,384
- Issue date Sep 21, 2021
- Huawei Technologies Co., Ltd.
- Yuanwu Wang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Upgrading method, system and apparatus of low-density wavelength di...
- Patent number 8,380,070
- Issue date Feb 19, 2013
- Huawei Technologies Co., Ltd.
- Congqi Li
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL AMPLIFIER, OPTICAL SIGNAL AMPLIFICATION METHOD, GAIN ADJUST...
- Publication number 20240079842
- Publication date Mar 7, 2024
- Huawei Technologies Co., Ltd
- Hangting Hu
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
FAULT DETECTION METHOD FOR OPTICAL SWITCHING APPARATUS, NETWORK DEV...
- Publication number 20230224033
- Publication date Jul 13, 2023
- Huawei Technologies Co., Ltd
- Yun LONG
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
FIBER AMPLIFIER AND GAIN ADJUSTMENT METHOD FOR FIBER AMPLIFIER
- Publication number 20210384986
- Publication date Dec 9, 2021
- Huawei Technologies Co., Ltd
- Yuanwu WANG
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
FIBER AMPLIFIER AND GAIN ADJUSTMENT METHOD FOR FIBER AMPLIFIER
- Publication number 20200403711
- Publication date Dec 24, 2020
- Huawei Technologies Co., Ltd
- Yuanwu WANG
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
UPGRADING METHOD, SYSTEM AND APPARATUS OF LOW-DENSITY WAVELENGTH DI...
- Publication number 20100142960
- Publication date Jun 10, 2010
- Huawei Technologies Co., Ltd
- Congqi LI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE