Photonics Research, 2017, 5 (2): 02000088, Published Online: Sep. 26, 2018
Analytical formulation for the bend loss in single-ring hollow-core photonic crystal fibers 
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Fig. 1. (a) Sketch of the geometry of a single-ring HC-PCF, showing the local coordinate system. The inner diameter of the six capillaries is d D Δ n 01 01 LP 01 R / D d / D = 0.696 λ / D
Fig. 2. Numerically calculated axial Poynting vector distributions and loss α of a single-ring PCF with d = 55 μm D = 79 μm λ = 2.8 μm t = 1.15 μm R cr 01 = 17.2 cm R cr 01 LP 01 θ = ± 60 °
Fig. 3. Numerically calculated bend loss for the fibers for θ = 0 ° R / D A : ( d , D , λ ) = ( 55,79 , 2.8 ) μm d / D = 0.70 λ / D = 0.035 B : ( d , D , λ ) = ( 22,36 , 1.2 ) μm d / D = 0.61 λ / D = 0.033 4 ) with θ = 0 ° θ = ± 60 ° y 1(a) .
Fig. 4. Experimentally measured bend loss in two fibers with the same shape parameters as in Fig. (3 ). (a) d / D = 0.70 d / D = 0.61 4 ) for θ = 0 ° θ = 30 °
Michael H. Frosz, Paul Roth, Mehmet C. Günendi, Philip St.J. Russell. Analytical formulation for the bend loss in single-ring hollow-core photonic crystal fibers[J]. Photonics Research, 2017, 5(2): 02000088.
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