Lithium Niobate Thin Film Polarization Beam Splitter Based on Asymmetric Directional Coupling

Wu, Yinan; Sun, Xuerui; Li, Hao; Lu, Chuanyi; Zhang, Yuting; Liu, Shijie; Zheng, Yuanlin; Chen, Xianfeng

doi:10.1109/jlt.2022.3203409

Cited by 15 publications

(5 citation statements)

References 40 publications

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“…Some PSRs exhibit large ERs, BWs, and short lengths because they are fabricated on a thinner LNOI platform [16] or propagate along the z-axis [34], having a larger Δ at the mode hybridization point than our PSR thus being easier for PSR applications. The MMI [15,35], Y-junction [33], and ADC [34] approaches provide shorter device lengths but limited BW. Our STA PSR shows a balanced length, ER, BW, and IL performance.…”

Section: Device Fabrication and Characterizationmentioning

confidence: 99%

Broadband adiabatic polarization rotator-splitter based on a lithium niobate on insulator platform

et al. 2021

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Polarization rotator-splitters (PRSs) are crucial components for controlling the polarization states of light in classical and quantum communication systems. We design and experimentally demonstrate a broadband PRS based on the lithium niobate on insulator (LNOI) platform. Both the rotator and splitter sections are based on adiabatically tapered waveguide structures, and the whole device only requires a single etching step. We show efficient PRS operation over an experimentally measured bandwidth of 130 nm at telecom wavelengths, potentially as wide as 500 nm according to simulation prediction, with relatively low polarization crosstalks of ∼ − 10 dB . Our PRS is highly compatible with the design constraints and fabrication processes of common LNOI photonic devices, and it could become an important element in future LNOI photonic integrated circuits.

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Section: Device Fabrication and Characterizationmentioning

confidence: 99%

Broadband adiabatic polarization rotator-splitter based on a lithium niobate on insulator platform

et al. 2021

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“…Due to the high refractive index difference, SOI waveguides have strong limiting ability to light, which is helpful to achieve compact size and large-scale integration. However, the high birefringence nature would also lead to polarization sensitivity problems in all silicon nanophotonic devices (Feng et al 2016) , and different high-efficiency polarization diversity systems have been proposed to reduce the errors, including polarization beam splitters (PBS) (Wu et al 2022;Bai et al 2017;Yin et al 2022) , polarization rotators (PR) (Gao et al 2013;Chen et al 2011;Guan et al 2014) and polarization splitter-rotators (PSR) (Wang et al 2021;Chen et al 2021;Bai et al 2020) . It should be noted that the use of PSR can separate the TM and TE mode, meanwhile realize the conversion of one mode to the other.…”

Section: Principle and Designmentioning

confidence: 99%

TE-pass polarizers based on mode rotation and coupling in SOI platform

chen,

song,

guo

et al. 2023

AOPC 2023: AI in Optics and Photonics

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“…Waveguide beam splitters capable of guiding full-wavelength visible, near-infrared, and mid-infrared light have potential for fast optical communication and sensing, as well as quantum information processing. For instance, in the visible light and near-infrared regimes, LiNbO 3 waveguide beam splitters can achieve high-precision optical wavelength selection and signal distribution [8][9][10], and in the mid-infrared region, they are essential for environment monitoring and medical diagnostics [11,12].…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional polarization-dependent full-wavelength beam splitter written by femtosecond laser in LiNbO3 crystal

Lv,

Li,

et al. 2024

Preprint

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We report on the fabrication of Y-branched waveguide beam splitters with cladding structures in LiNbO3 crystal by direct femtosecond laser writing. The femtosecond laser writes tracks near the surface of the crystal, constructing a square structure based on the Type II geometry. The waveguides beam splitters support propagation of full-wavelength light from the visible to mid-infrared, which was experimentally and numerically investigated. In addition, it has been found that the guidance is only along the vertical (i.e., TM) polarization, which is due to the different refractive indices in the longitudinal and transverse directions. The femtosecond-laser writing here also represents an alternative for fabricating complex integrated light guiding in crystals.

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Lithium Niobate Thin Film Polarization Beam Splitter Based on Asymmetric Directional Coupling

Cited by 15 publications

References 40 publications

Broadband adiabatic polarization rotator-splitter based on a lithium niobate on insulator platform

Broadband adiabatic polarization rotator-splitter based on a lithium niobate on insulator platform

TE-pass polarizers based on mode rotation and coupling in SOI platform

Three-dimensional polarization-dependent full-wavelength beam splitter written by femtosecond laser in LiNbO3 crystal

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