Topic
Step-index profile
About: Step-index profile is a research topic. Over the lifetime, 3104 publications have been published within this topic receiving 53199 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: Fiber Bragg grating (FBG) embedded in a microfiber Mach-Zehnder interferometer (MZI) is presented for sensing multiparameters, such as temperature and refractive index as mentioned in this paper.
Abstract: Fiber Bragg grating (FBG) embedded in a microfiber Mach–Zehnder interferometer (MZI) is presented for sensing multiparameters, such as temperature and refractive index. The MZI is constructed by splicing a short length of 40- $\mu \text{m}$ -diameter microfiber between standard single mode fibers. A millimeter long FBG is then written in the microfiber using direct point-by-point ultrafast laser inscription method. The microfiber MZI shows moderate sensitivity to ambient refractive index and temperature changes. In contrast, the microfiber FBG is insensitive to ambient refractive index change while it exhibits typical sensitivity to temperature variation. These distinct characteristics of the FBG and MZI sensors enable the simultaneous measurement of refractive index and temperature, and temperature compensation in ambient refractive index measurement.
30 citations
TL;DR: In this paper, a low-loss and high-bandwidth graded-index plastic optical fiber (GI-POF) was obtained by a thermal drawing of the preform fabricated by the centrifugal deposition method.
Abstract: Low-loss and high-bandwidth graded-index plastic optical fiber (GI-POF) was obtained by a thermal drawing of the preform fabricated by the centrifugal deposition method. In the method, a mixture of methyl methacrylate and benzyl methacrylate is fed into a rapidly rotating tube. The mixture forms a thin layer on the tube wall due to the centrifugal force and polymerizes simultaneously by thermal reaction. The feeding rate and the composition of the mixture were changed to form a desired refractive index profile. The refractive index profile of the fiber was the same as the preform. The GI-POF has the optical loss of 120 dB/km and the bandwidth of 3.45 Gbit/s 100 m at the wavelength of 650 nm.
30 citations
TL;DR: In this article, the spatial distribution and depth profile of refractive index in the non-linear optical layer of a thermally poled boro-phosphate-niobate glasses were investigated.
30 citations
TL;DR: In this paper, a simple D-shaped plastic multimode fiber optic sensor is proposed and demonstrated for refractive index testing, which exhibits a good linear relationship between the receiving optical power and the test medium.
30 citations
Patent•
16 Jul 2009TL;DR: In this article, a double-clad optical fiber includes a core, an inner cladding and an outer cladding of silica-based glass, and the relative refractive index percent (Δ%) of the core relative to the inner claddings may be greater than about 0.1%.
Abstract: A double-clad optical fiber includes a core, an inner cladding and an outer cladding of silica-based glass. The core may have a radius of less than about 5 μm, a first index of refraction n1 and does not contain any active rare-earth dopants. The inner cladding may surround the core and includes a radial thickness of at least about 25 μm, a numerical aperture of at least about 0.25, and a second index of refraction n2 such that n2
30 citations