Hollow-core photonic quasicrystal fiber with high birefringence and ultra-low nonlinearity

Zhuang Huo; Exian Liu; Jianjun Liu

doi:10.3788/COL202018.030603

Chinese Optics Letters, Volume. 18, Issue 3, 030603(2020)

Hollow-core photonic quasicrystal fiber with high birefringence and ultra-low nonlinearity

Zhuang Huo, Exian Liu, and Jianjun Liu^*

Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education & Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices, School of Physics and Electronics, Hunan University, Changsha 410082, China

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Figures & Tables(8)

Fig. 1. (a) Cross section structure of the six-fold photonic quasicrystal (the origin $O$ of the coordinate system OXY is set at the center of the fiber core); (b) the cross section structure of HC-PQF.

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$Mode field distribution of HC-PQF: (a) direction of X polarization; (b) direction of Y polarization; (c) the effective refractive index of the X and Y polarization modes, and the corresponding birefringence.$

Fig. 2. Mode field distribution of HC-PQF: (a) direction of X polarization; (b) direction of Y polarization; (c) the effective refractive index of the X and Y polarization modes, and the corresponding birefringence.

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Fig. 3. Birefringence of HC-PQF under different $d_{1}$ values filled with air.

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Fig. 4. When $d_{1} = 2.17 μ m$ , the effect of filling ratio on birefringence.

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Fig. 5. When $d / Λ = 0.910$ and $d_{1} = 2.17 μ m$ , the effect of changing the distance $r$ between the $d_{2}$ small air hole and the fiber core on birefringence.

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Fig. 6. $d / Λ = 0.910$ , $d_{1} = 2.17 μ m$ , $r = 1.50 Λ$ , changing the core filling gas: (a) the relationship between mode field area and wavelength, (b) the relationship between nonlinear coefficient and wavelength.

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Fig. 7. Influence of the diameter of the hollow core on dispersion characteristics with $d / Λ = 0.91$ and $r = 1.50 Λ$ .

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Table 1. Parameter Comparison of this HC-PQF with Previous Designs
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Table 1. Parameter Comparison of this HC-PQF with Previous Designs
PCF structure Ref. Birefringence Nonlinear coefficient (W^-1·km^-1)
PC-PCF [34] 0.005 /
HC-PCF [35] $5.8 \times 10^{- 3}$ /
SGNLC-PCF [36] 0.042 425.5
Proposed HC-PQF This work $1.345 \times 10^{- 2}$ $1.63 \times 10^{- 3}$

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Zhuang Huo, Exian Liu, Jianjun Liu, "Hollow-core photonic quasicrystal fiber with high birefringence and ultra-low nonlinearity," Chin. Opt. Lett. 18, 030603 (2020)

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