{"title":"阶跃折射率光纤模式截止频率附近的标量近似失效","authors":"E. Romanova","doi":"10.1109/ICTON.2001.934712","DOIUrl":null,"url":null,"abstract":"The feasibility of the scalar approximation used in the theory of weakly-guiding optical fibers is considered near the cutoff frequency of the HE/sub 1n/(LP/sub 0n/) mode. The asymptotic behavior of polarisation corrections for transverse and longitudinal wavenumbers of a lossy fiber mode is investigated both analytically and numerically. These results as well as the transmittance calculated for an irregular fiber consisting of single-mode and bimodal segments demonstrate the failure of scalar approximation near the cutoff frequency.","PeriodicalId":301018,"journal":{"name":"Proceedings of 2001 3rd International Conference on Transparent Optical Networks (IEEE Cat. No.01EX488)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2001-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Failure of the scalar approximation near cutoff frequency of a step-index fiber mode\",\"authors\":\"E. Romanova\",\"doi\":\"10.1109/ICTON.2001.934712\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The feasibility of the scalar approximation used in the theory of weakly-guiding optical fibers is considered near the cutoff frequency of the HE/sub 1n/(LP/sub 0n/) mode. The asymptotic behavior of polarisation corrections for transverse and longitudinal wavenumbers of a lossy fiber mode is investigated both analytically and numerically. These results as well as the transmittance calculated for an irregular fiber consisting of single-mode and bimodal segments demonstrate the failure of scalar approximation near the cutoff frequency.\",\"PeriodicalId\":301018,\"journal\":{\"name\":\"Proceedings of 2001 3rd International Conference on Transparent Optical Networks (IEEE Cat. No.01EX488)\",\"volume\":\"26 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2001-06-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of 2001 3rd International Conference on Transparent Optical Networks (IEEE Cat. No.01EX488)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICTON.2001.934712\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of 2001 3rd International Conference on Transparent Optical Networks (IEEE Cat. No.01EX488)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICTON.2001.934712","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Failure of the scalar approximation near cutoff frequency of a step-index fiber mode
The feasibility of the scalar approximation used in the theory of weakly-guiding optical fibers is considered near the cutoff frequency of the HE/sub 1n/(LP/sub 0n/) mode. The asymptotic behavior of polarisation corrections for transverse and longitudinal wavenumbers of a lossy fiber mode is investigated both analytically and numerically. These results as well as the transmittance calculated for an irregular fiber consisting of single-mode and bimodal segments demonstrate the failure of scalar approximation near the cutoff frequency.