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Express"],"published-print":{"date-parts":[[2022,7,18]]},"abstract":"<jats:p>In this study, a simple and reliable method enabling to well synthesize the complex orbit-angular-momentum (OAM) spectrum of hybrid mode in a few-mode fiber is proposed and numerically demonstrated, which is realized by using the so-called inverse scattering method based on the genetic algorithm (GA), where the main Fourier components of a specially-selected ring in intensity distribution of the hybrid mode is used as the optimization objective. As a proof-of-concept example, power spectrum of a hybrid mode consisted of the first- and second-order OAM modes was successfully reconstructed with an accuracy higher than 0.99. This is the first time, to the best of our knowledge, that the complex OAM spectrum of a fiber hybrid mode consisted of more than two kinds of OAM modes is synthesized directly from the intensity distribution of the hybrid mode itself.<\/jats:p>","DOI":"10.1364\/oe.463608","type":"journal-article","created":{"date-parts":[[2022,6,22]],"date-time":"2022-06-22T17:30:18Z","timestamp":1655919018000},"page":"26286","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Synthesizing the complex orbital-angular-momentum spectrum of hybrid modes existed in a few-mode fiber"],"prefix":"10.1364","volume":"30","author":[{"given":"Yuanyuan","family":"Hao","sequence":"first","affiliation":[{"name":"Nanjing Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chenji","family":"Guo","sequence":"additional","affiliation":[{"name":"Nanjing Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xunhua","family":"Huang","sequence":"additional","affiliation":[{"name":"Nanjing Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiannan","family":"Xu","sequence":"additional","affiliation":[{"name":"Nanjing Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huali","family":"Lu","sequence":"additional","affiliation":[{"name":"Nanjing Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1261-4993","authenticated-orcid":true,"given":"Hua","family":"Zhao","sequence":"additional","affiliation":[{"name":"Nanjing Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peng","family":"Wang","sequence":"additional","affiliation":[{"name":"Nanjing Xiaozhuang University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2323-6107","authenticated-orcid":true,"given":"Hongpu","family":"Li","sequence":"additional","affiliation":[{"name":"Shizuoka University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2022,7,5]]},"reference":[{"key":"oe-30-15-26286-R1","doi-asserted-by":"publisher","first-page":"8185","DOI":"10.1103\/PhysRevA.45.8185","volume":"45","author":"Allen","year":"1992","journal-title":"Phys. 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