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However, the number of sortable integer\u2010order OAM states remains limited. Herein, we propose a general spiral transformation, that is, wind spiral transformation, to conduct sortable fractional\u2010order OAM states to solve the existing drawback. By transforming a fractional\u2010order OAM mode into a superposition of integer\u2010order OAM states, the sorting capacity of OAM mode is significantly extended, where the proposed method is suitable for integer and fractional OAM mode sorting. Further, the proposed scheme is applied to image encoding and decoding, resulting in good image reconstruction and unlocking a scalable paradigm for high\u2010dimensional information encoding and decoding. This proposed sorting method shows great potential for implementing highly confidential data storage systems, which may encourage further applications in classical and quantum regimes.<\/jats:p>","DOI":"10.1002\/nap2.70086","type":"journal-article","created":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T07:18:49Z","timestamp":1776410329000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Fractional Orbital Angular Momentum Sorting Using Wind Spiral Transformation"],"prefix":"10.1002","volume":"15","author":[{"given":"Xiaobin","family":"Yang","sequence":"first","affiliation":[{"name":"School of Physics and Engineering &amp; School of Chemistry and Chemical Engineering Henan University of Science and Technology  Luoyang China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mengran","family":"Fan","sequence":"additional","affiliation":[{"name":"School of Physics and Engineering &amp; School of 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