Surface Plasmon Resonance-Based Single-Polarization Optical Fiber for Broadband Applications

Abstract

Of current concern to global health is the emergence of a novel human coronavirus (SARS-CoV 2) causing severe respiratory tract infections in humans. Person to person and surface contact have been fingered as the major transmission route of SARS-CoV-2. The ability of virus to survive in the environment is a critical factor in viral transmission. Recent researches have shown that the virus can survive on surface of plastics up to 5 days under room temperature and in aerosol for up to 3 hours. Therefore this research opinion proposes that SARS-CoV-2 can be accommodated in formed viral biofilms on microplastics surfaces and can thus be deposited over longer distances (> 100 km), than is currently being thought to be, since microplastics are airborne over long distances. This pathway should be studied by scientist as it may provide insight on why some region experienced the outbreak The polarization changes of fiber guided mode have serious effect on the performance of fiber sensors [1-2]. In order to suppress the polarization effects, the popular solutions are to employ polarization-maintaining fibers, single-polarization fibers and polarizers into sensor systems. As a key component, all-fiber polarizers have been designed in various schemes involving metal or graphene-coated polarizers [3-6], tunable fiber polarizers [7-8] and fiber-grating polarizers [9-10]. Fiber polarizers maintain efficient transmission of single polarization mode, while deplete other polarization modes via certain mode-coupling mechanisms. Particularly, broadband polarizers covering the telecom bands are widely desirable in practice. However, it is basically difficult to achieve broadband operation in traditional fiber polarizers. Recently, some solutions were presented to overcome the limitation of working bandwidth to push broadband single polarization fibers. Typically, graphene-covered fiber polarizer was proposed to improve the layers are different, which expressed as hd1 and hd2, respectively. The refractive index of dielectric layer is described by nd = 1.438. (a) d2 d3 hAu d1 y z o x PML Cladding Au Dielectric Core Air core bandwidth coverage from 1.56μm to 1.63μm. The extinction ratios were about 25dB to 36dB in a fiber length of 2.5 mm [11]. Fiber grating polarizers were also suggested to increase the working band in single polarization operation, but at the cost of larger sizes than metal-coated fiber polarizers [12]. For the tunable polarizers, some tunable parameters such as temperature or voltage have to be tuned in order to operate in broadband [7-8]. In contrast, double hole fibers (DHFs) can be much attractive in the applications of single polarization fibers and optical sensing due to compact scale, flexible and reliability [13-15]. no trace/history of visit or contact by an infected person. As there are currently no specific therapies for SARS-CoV-2, we therefore proposed that total lockdown (which have also reduced global anthropogenic activities) is perhaps in the best interest of mankind.