Etching Bragg gratings in Panda fibers for the temperature-independent refractive index sensing
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TLDR
The evolution of the Bragg gratings inscribed in Panda fibers with chemical etching is demonstrated and the finalizing grating can be exploited for the temperature-independent refractive index sensing.Abstract:
We demonstrate the evolution of the Bragg gratings inscribed in Panda fibers with chemical etching. The resonance wavelengths can blueshift with cladding reduction similar to the conventional counterparts. But the wavelength separation between the two polarizations is co-determined by the stress and the asymmetric shape effects. The fast and slow axes of the fiber can be reversed with each other and zero birefringence can be achieved by chemical etching the structure. When the stress-applying parts of the fiber are removed, the finalizing grating can be exploited for the temperature-independent refractive index sensing, since the modes corresponding to the two polarizations exhibit the dissimilar responses to the external refractive index change but the same response to temperature. Our device is featured with easy achievement, spectral controllability, and relative robustness.read more
Citations
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Optical Refractive Index Sensors with Plasmonic and Photonic Structures: Promising and Inconvenient Truth
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TL;DR: In this paper, the authors focus on optical refractive index (RI) sensors with no fluorescent labeling required, and utilize two parameters to characterize and compare the performance of optical RI sensors: sensitivity to RI change (denoted by symbol SRI) and figure of merit (in short, FoM).
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Fiber Bragg grating sensors for monitoring of physical parameters: a comprehensive review
TL;DR: Fiber Bragg grating has embraced the area of fiber optics since the early days of its discovery, and most fiber optic sensor systems today make use of fiber Bragg-grating technology as discussed by the authors.
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Polarization-Assisted Fiber Bragg Grating Sensors: Tutorial and Review
TL;DR: Polarization control of the interrogating light can be used for sensing parameters that are spatially oriented, such as lateral force, bending or twist, and also for measurements of the properties of anisotropic media as mentioned in this paper.
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Fiber-optic refractometer based on a phase-shifted fiber Bragg grating on a side-hole fiber.
TL;DR: A novel demodulation method based on laser frequency modulation to enhance the sensor dynamic range is proposed and demonstrated.
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Etched multicore fiber Bragg gratings for refractive index sensing with temperature in-line compensation
TL;DR: In this paper, a novel refractive index sensor based on etched multicore fiber Bragg gratings with temperature in-line compensation is proposed and experimentally demonstrated, and the proposed structure is able to in line and in-situ determine refractive indices and temperature simultaneously.
References
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Subwavelength-diameter silica wires for low-loss optical waveguiding
TL;DR: In this article, a two-step process is described to generate a micrometer sized diameter silica preform fiber, and then the preform is drawn while coupled to a support element to form a nanometer sized diameter fiber.
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Bragg gratings fabricated in monomode photosensitive optical fiber by UV exposure through a phase mask
TL;DR: In this paper, a photolithographic method is described for fabricating refractive index Bragg gratings in photosensitive optical fiber by using a special phase mask grating made of silica glass.
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Highly sensitive fiber Bragg grating refractive index sensors
TL;DR: In this paper, the authors combine fiber Bragg grating (FBG) technology with a wet chemical etch-erosion procedure and demonstrate two types of refractive index sensors using singlemode optical fibers.
Journal ArticleDOI
Polarization-maintaining fibers and their applications
Juichi Noda,K. Okamoto,Y. Sasaki +2 more
TL;DR: In this article, the classification of high-birefringent and low-birrringent fibers and their fabrication methods and characteristics are discussed in Section II and Section III, respectively.
Journal ArticleDOI
Characterization of UV-induced birefringence in photosensitive Ge-doped silica optical fibers
Turan Erdogan,Victor Mizrahi +1 more
TL;DR: The anisotropic nature of the UV-induced index change achieved in photosensitive optical fibers is characterized by a direct measurement of the induced birefringence in three different fibers.