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EP 4 233 138 A1

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(43) Date of publication: 30.08.2023 Bulletin 2023/35 (21) Application number: 21707662.9 (22) Date of filing: 22.02.2021

(51) International Patent Classification (IPC):  H01S 5/50(2006.01) H01S 5/16(2006.01) H01S 5/32(2006.01) H01S 5/10(2021.01) H01S 5/22(2006.01) H01S 5/343(2006.01) (52) Cooperative Patent Classification (CPC): H01S 5/1014; H01S 5/1032; H01S 5/1039; H01S 5/164; H01S 5/22; H01S 5/34306; H01S 5/50; H01S 2301/02; H01S 5/3213; H01S 5/1057 (86) International application number: PCT/EP2021/054270 (87) International publication number: WO 2022/174927 (25.08.2022 Gazette 2022/34)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (71) Applicant: Huawei Technologies Co., Ltd. Shenzhen, Guangdong 518129 (CN)	(72) Inventors: GALLET, Antonin 80992 Munich (DE) BRENOT, Romain 80992 Munich (DE) (74) Representative: Gill Jennings & Every LLP  The Broadgate Tower 20 Primrose Street London EC2A 2ES London EC2A 2ES (GB)