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http://hdl.handle.net/10397/109031
Title: | Tunable all-fiber polarization filter based on graphene-assisted metal gratings for the O- and C-bands | Authors: | Wang, Y Wang, Z Qu, J Cheng, Z Huang, D Yu, C |
Issue Date: | 1-Nov-2023 | Source: | Journal of the Optical Society of America B : optical physics, 1 Nov. 2023, v. 40, no. 11, p. 2868-2874 | Abstract: | All-fiber polarization filters have important applications in optical communication, sensing, and fiber lasing. However, the incompatibility between high extinction ratio and short interaction length is a problem for miniaturization. In addition, current passive designs make polarization filters work in a fixed wavelength band, which limits the dynamic polarization control. Here, we integrate subwavelength metal gratings on graphene-covered D-shaped single-mode fibers to achieve tunable polarization filters, whose operating bandwidth has a significant improvement over previous works. In the simulation, the x-polarized mode couples effectively with the surface plasmon polariton mode and suffers extremely high transmission loss (up to 38 dB=mm). At the same time, the y-polarized mode remains low insertion loss of 0.58 dB=mm. By changing the chemical potential of graphene, the loss peak of the x-polarized mode can be adjusted in the range covering the wavelength bands from 1.272 to 1.353 m or from 1.54 to 1.612 m, which results in an adjustable broadband filter with a high extinction ratio over 20 dB. The proposed filter provides a promising polarization control scheme for integrated devices in the fields of communication, sensing, and lasing. | Publisher: | Optica Publishing Group | Journal: | Journal of the Optical Society of America B : optical physics | ISSN: | 0740-3224 | EISSN: | 1520-8540 | DOI: | 10.1364/JOSAB.502260 |
Appears in Collections: | Journal/Magazine Article |
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