Dual-core negative curvature fiber-based terahertz polarization beam splitter with ultra-low loss and wide bandwidth
نویسندگان
چکیده
A novel terahertz polarization beam splitter (PBS) with low loss and large bandwidth based on double core negative curvature fiber is designed. The device takes copolymers of cycloolefin as the substrate, 12 circular tubes embedded are evenly distributed along circumference. divided into two cores through groups circumscribed small clad symmetrical up down. finite-difference time-domain (FDTD) method used to analyze its guide mode properties. effects various structural parameters splitting characteristics investigated in detail, extinction ratio (ER), transmission PBS analyzed. simulation results show that when incident light frequency 1THz length 6.224 cm, ER <i>x</i>-polarized reaches 120.8 dB, above 20 dB 0.024 THz, <i>y</i>-polarized 63.74 0.02THz, total 0.037 dB/cm. Tolerance analysis shows can still maintain good performance under ±1% deviation parameters.
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ژورنال
عنوان ژورنال: Chinese Physics
سال: 2022
ISSN: ['1000-3290']
DOI: https://doi.org/10.7498/aps.71.20211650