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Fang L, Jia H, Zhou H, et al. Generation of cylindrically symmetric modes and orbital-angular-momentum modes with tilted optical gratings inscribed in high-numerical-aperture fibers. J Opt Soc Am A Opt Image Sci Vis. 2015;32(1):150-5doi: 10.1364/josaa.32.000150.
Fang, L., Jia, H., Zhou, H., & Liu, B. (2015). Generation of cylindrically symmetric modes and orbital-angular-momentum modes with tilted optical gratings inscribed in high-numerical-aperture fibers. Journal of the Optical Society of America. A, Optics, image science, and vision, 32(1), 150-5. https://doi.org/10.1364/josaa.32.000150
Fang, Liang, et al. "Generation of cylindrically symmetric modes and orbital-angular-momentum modes with tilted optical gratings inscribed in high-numerical-aperture fibers." Journal of the Optical Society of America. A, Optics, image science, and vision vol. 32,1 (2015): 150-5. doi: https://doi.org/10.1364/josaa.32.000150
Fang L, Jia H, Zhou H, Liu B. Generation of cylindrically symmetric modes and orbital-angular-momentum modes with tilted optical gratings inscribed in high-numerical-aperture fibers. J Opt Soc Am A Opt Image Sci Vis. 2015 Jan 01;32(1):150-5. doi: 10.1364/josaa.32.000150. PMID: 26366499.
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J Opt Soc Am A Opt Image Sci Vis. 2015 Jan 01;32(1):150-5. doi: 10.1364/josaa.32.000150.

Generation of cylindrically symmetric modes and orbital-angular-momentum modes with tilted optical gratings inscribed in high-numerical-aperture fibers.

Journal of the Optical Society of America. A, Optics, image science, and vision

Liang Fang, Hongzhi Jia, Hai Zhou, Baiying Liu

PMID: 26366499 DOI: 10.1364/josaa.32.000150

Abstract

Optical fiber with high numerical aperture (NA) can efficiently relieve the degeneracy of higher-order linearly polarized modes. The degeneracy relief is investigated in two types of high-NA fibers, i.e., low-index-cladding fiber and high-index-core fiber. A naked-core fiber, as with low-index cladding, can be used theoretically to generate the orbital-angular-momentum mode (OAMM) HE21 and the cylindrically symmetric modes (CSMs) TM01 and TE01. A high-index-core fiber incorporated with high-contrast-index structure can be used similarly to obtain OAMM HE31. The generation of both CSMs and OAMMs required tilted optical gratings to couple the fundamental core mode HE11 into these modes. The tilt angle and modulation period of the grating fringes can be calculated simply and visually with the method proposed in this article.

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