Novel in-line effective fiber polarizer based on chromium and gold nano metal films: design and experiment

Yahyaei, Bahareh; Panahi, Omid; Malekmohamadi, Sedighe; Mousavi, Mahdi; Mardiha, Mahdi; kheyrollahi, mehrdad

doi:10.1088/1054-660x/27/1/015101

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…Utilizing these polarizers in optical systems results in more compact, alignment-free, and fully integrated configurations. In recent years, modified photonic crystal fibers 10–12 , plasmonic structures 13–15 , tilted fiber Bragg gratings 16,17 , and microfiber couplers 18 have been used to realize in-line polarizers. However, they are still far away from the specifications of state-of-the-art free-space polarizers.…”

Section: Introductionmentioning

confidence: 99%

Utilizing polarization-selective mode shaping by chalcogenide thin film to enhance the performance of graphene-based integrated optical devices

Nikbakht

Latifi

Parsanasab

et al. 2019

Sci Rep

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High refractive index (RI) thin films are capable of pulling waveguide mode profiles towards themselves. In this study, it is shown that by applying high RI coatings with specific thicknesses on the side of optical waveguides, significantly different mode profiles for orthogonal polarizations can be achieved. This phenomenon, that we call it polarization-selective mode shaping, can be extensively used in the enhancement of polarization-dependent integrated optical devices. As an illustrating application, a tri-layer structure consisting of poly(methyl methacrylate)/graphene/chalcogenide on a side-polished fiber is designed to realize an extremely high extinction ratio polarizer. This structure changes the mode profiles in a way that the attenuation of TE mode is maximized, while the power carried by the TM mode remains relatively constant. Simulations and experimental characterizations confirm that polarization-selective mode shaping coordinates four loss mechanisms to maximize the extinction ratio and minimize the insertion loss of the polarizer. The fabricated polarizer is examined in the O, C, and L telecommunication frequency bands. This configuration achieves the high extinction ratio of 51.3 dB and its maximum insertion loss in the tested wavelengths is 1.79 dB. The proposed polarizer has been compared with other state-of-the-art polarizers in the conclusion section which shows its superiority.

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Section: Introductionmentioning

confidence: 99%

Utilizing polarization-selective mode shaping by chalcogenide thin film to enhance the performance of graphene-based integrated optical devices

Nikbakht

Latifi

Parsanasab

et al. 2019

Sci Rep

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Broadband polarizer using single-layer grating with ultra-high extinction ratio

et al. 2023

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Polarizers are an essential optical element for tailoring the polarization state of electromagnetic waves in a wide range of optical devices. Such polarizers, which exhibit a wide operating bandwidth and high performance, are attracting increasing attention, due to their extensive prospects for use in applications ranging from polarization imaging, to optical communications and detection, among others. However, achieving both broadband performance and ultra-high extinction ratio (ER), and that simultaneously, is still challenging in the design of effective polarizers. To tackle that demand, in this work, an Au-on-silica grating structure has been proposed as the basis of the design of a miniaturized high-efficiency polarizer that practically can cover the entire visible and near-infrared spectral ranges. The single-layer polarizer thus designed can show an ER of 60 dB in this spectral domain, and it has been shown that the geometrical parameters selected have a significant effect on the performance characteristics of the polarizer. Furthermore, an ER of ∼150 dB could be achieved merely by regulating the thickness of the grating to achieve the optimum performance. By integrating the high-performance polarizer proposed in this work with an optical fiber “meta-tip,” a refractive polarizer with a value of the ER of >45 dB, and that over the entire spectral domain considered, has been demonstrated. Such an approach offers an alternative route to achieving a broadband, powerful, and flexible processing polarizer design.

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Novel in-line effective fiber polarizer based on chromium and gold nano metal films: design and experiment

Cited by 2 publications

References 15 publications

Utilizing polarization-selective mode shaping by chalcogenide thin film to enhance the performance of graphene-based integrated optical devices

Utilizing polarization-selective mode shaping by chalcogenide thin film to enhance the performance of graphene-based integrated optical devices

Broadband polarizer using single-layer grating with ultra-high extinction ratio

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