WebJan 1, 2024 · This work shows that the helical structure has a wide range of applications in fiber gratings, all-fiber interference devices, ... [78], medicine [71], [79], sensors [72], [80], [81], and other fields. Among them, the application of chiral features in the field of optical fiber sensing has been widely concerned in recent years. This is because ... Web2. Coupled-mode theory of chiral fiber gratings In this section we develop a general coupled-mode theory of light propagation in chiral fiber gratings (CFGs). The general classification of the electromagnetic eigenmodes of a straight cylindrical core step index fiber has been well established for decades, and can be found in a number of
Optical fiber sensor based on helical Fibers: A review
WebIn contrast to conventional long-period gratings, in which the modulation is imposed by exposing a photosensitive core to ultraviolet light, we have created chiral long-period gratings with single- or double-helix symmetry by twisting optical fibers with nonconcentric or noncircular cores, respectively, as they pass through a short heat zone. online tracker passport
A new twist on fiber optics EurekAlert!
WebAug 1, 2004 · Chiral gratings with double helix symmetry were produced by twisting glass optical fiber with a noncircular core cross section as it passed through a miniature oven. … WebWe demonstrated the fabrication of a chiral long-period grating (CLPG) by twisting a two-mode fiber (TMF) when a CO2 laser beam was sweeping along the fiber axis. The torsion, temperature, and surrounding refractive index characteristics of the fabricated TMF-CLPG were investigated experimentally. The fabricated TMF-CLPG has a high torsion … WebApr 8, 2024 · Chiral long-period grating (CLPG) is one kind of special long-period fiber gratings (LPFGs). On one hand, like ordinary LPFG (Ivanovic and Petrovic 2016; Chao 2024), CLPG possesses a periodic modulation of refractive index in the longitudinal direction, with a period ranging from about 100 to 1 mm, which enables light coupling … online tracker blockieren