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Fiber polarizer based on selectively silver-coated large-core suspended-core fiber
Optics Letters ( IF 3.6 ) Pub Date : 2021-05-07 , DOI: 10.1364/ol.428087
Xian Zhang , Caoyuan Wang , Ruowei Yu , Limin Xiao , Xiao-Song Zhu , Yi-Wei Shi

A tunable fiber polarizer based on the selectively silver-coated large-core suspended-core fiber (LSCF) was proposed. A thin silver layer was coated on the inner surface of two opposite air holes of the LSCF by the chemical liquid-phase deposition method. The $y$-polarized light (parallel to the two silver-coated air holes) will excite surface plasmon resonance and experience large transmission loss, while the $x$-polarized light does not, resulting in a fiber polarizer. By varying the liquid filled in the microchannels of the LSCF, the operating wavelength can be tuned in the visible and near infrared region along with the surface plasmon resonance wavelength. The dependence of the polarization characteristics on the fiber length was experimentally investigated. The maximum polarization extinction ratio (PER) of 20.1 dB, 19.6 dB, and 18.3 dB and insertion loss (IL) of 2.24 dB, 2.56 dB, and 2.08 dB are achieved with the optimal fiber length of 16 cm at the operating wavelengths of 565.4 nm, 626.7 nm, and 739.7 nm, respectively. Compared with the multimode fiber-based polarizers reported previously, the proposed selectively silver-coated LSCF polarizer exhibits higher PER and lower IL.

中文翻译:

基于选择性镀银大芯悬浮芯纤维的光纤偏振器

提出了一种基于选择性镀银大芯悬浮纤芯(LSCF)的可调谐光纤偏振器。通过化学液相沉积法在LSCF的两个相对的气孔的内表面上涂覆薄银层。的$ Y $偏振光(平行于两个银包覆空气孔)将激发的表面等离子体共振和经验大传输损耗,而$ X $-偏振光不产生,导致光纤偏振器。通过改变填充在LSCF微通道中的液体,可以在可见光和近红外区域以及表面等离振子共振波长中调整工作波长。实验研究了偏振特性对纤维长度的依赖性。在工作波长为565.4的最佳光纤长度为16 cm的情况下,可获得最大偏振消光比(PER)为20.1 dB,19.6 dB和18.3 dB,插入损耗(IL)为2.24 dB,2.56 dB和2.08 dB分别为100nm,626.7nm和739.7nm。与先前报道的基于多模光纤的偏振片相比,拟议的选择性镀银的LSCF偏振片表现出更高的PER和更低的IL。
更新日期:2021-05-14
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