Long period fiber grating
Web12 de abr. de 2024 · In this article, we theoretically designed and simulated a silicon core fiber for the simultaneous detection of temperature and refractive index. We first discussed the parameters of the silicon core fiber for near single-mode operation. Second, we designed and simulated a silicon core-based fiber Bragg grating and applied it for … Web22 de out. de 2010 · The focused high-frequency CO 2 laser pulses scanned periodically across the employed fiber along “X” direction and then shifted a grating pitch along “Y” …
Long period fiber grating
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WebIn this work, we report the experimental results on optimizing the optical structure for ambient refractive index measuring with temperature changes monitoring. The presented … WebThe effects of the length of the fiber between long-period grating (LPG) and fiber Bragg grating (FBG), the film refractive index and thickness on the reflection spectra of coated …
WebLong-period fiber gratings are used to flatten the gain spectrum of erbium-doped fiber amplifiers. A broadband amplifier with <0.2-dB gain variation over 30 nm is presented. … Web22 de mar. de 2024 · The long-period fiber grating sensor pulse peak position against the transmission range is simulated clearly where the pulse peak value at zero position is …
Web16 de nov. de 2016 · We report a fiber-optic sensor for pH measurement, which is a long-period fiber grating (LPFG) coated with smart hydrogel. When the pH of a solution that surrounds the hydrogel coating changes, the volume of the coating and hence its refractive index are changed, which results in a shift in the resonance wavelength of the LPFG. … WebAbstract. Read online. In view of the common problems of fiber surface plasmon resonance sensor with weak strength, low sensitivity and low plasma excitation efficiency, this paper …
WebThe sensors measuring torsion, refractive index, and temperature are demonstrated, based on an improved helical long-period fiber gratings (HLPFG), in which the refractive-index and torsion sensitivity were significantly enhanced by reducing the grating diameter. This was achieved using the velocity difference between two translational stages as the …
Web16 de dez. de 2024 · Abstract: A long period fiber grating prepared by multimode fibers (MMF-LPFG) is proposed and experimentally demonstrated as a sensitivity-enhanced strain sensor. The core diameter mismatch between the MMFs excites the high order cladding mode to obtain a compact sensing structure (3.6 mm). The strain sensitivity of … massa molare na2cro4Web1 de out. de 2024 · Abstract. Fast and reliable detection of viruses, including those specific to bacteria – bacteriophages – is crucial in clinical and veterinary practice, during … massa molare nach3cooWeb1 de fev. de 2024 · The period of this grating structures reaches a few hundreds of micrometers, and is much longer than that of a fiber Bragg grating (FBG), has attracted great interest in sensing applications as the long periodic modulation of RI initiates coupling of light between the forward propagating core mode and forward propagating cladding … dateline contact infoWebThe long period fiber grating can be used for band pass filter, gain equalizer as well as others. Figure 1: an example of LPFG transmission curve Features: Wide Wavelength … dateline connie dabateThe structure of the FBG can vary via the refractive index, or the grating period. The grating period can be uniform or graded, and either localised or distributed in a superstructure. The refractive index has two primary characteristics, the refractive index profile, and the offset. Typically, the refractive index profile can be uniform or apodized, and the refractive index offset is positive or zero. massa molare naftalinaWeb1 de jul. de 2014 · We present a new class of long-period fiber gratings that can be used as in-fiber, low-loss, band-rejection filters. Photoinduced periodic structures written in the core of standard communication ... dateline consumedWeb1 de fev. de 2024 · The period of this grating structures reaches a few hundreds of micrometers, and is much longer than that of a fiber Bragg grating (FBG), has attracted … massa molare mercurio