Interrogation of interferometric sensors with a tilted fiber Bragg grating

Jáuregui, César; Incera, Antonio Quintela; Cobo, A.; Quintela, M. A.; Díaz, Silvia; López‐Higuera, J. M.

doi:10.1117/12.566522

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…Erdogan and Sipe were the first to give a detailed treatment to tilted fiber Bragg grating (TFBG) structures in 1996 [3]. Since then, a handful of application devices utilizing TFBGs were reported, including infiber spectrometer [4][5][6], WDM channel monitoring [7], gain flattening of EDFAs [8] and optical sensor interrogation [9][10][11]. Due to their exceptional polarization sensitivity, TFBGs have also been implemented as in-line polarimeter [12,13], polarization dependent loss equalizer [14,15] and, recently, high-extinction-ratio polarizers [16].…”

Section: Introductionmentioning

confidence: 99%

Low Thermal Sensitivity Grating Devices Based on Ex-45$^{\circ}$ Tilting Structure Capable of Forward-Propagating Cladding Modes Coupling

Zhou

Zhang

Chen

et al. 2006

J. Lightwave Technol.

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Abstract:We describe a detailed investigation on tilted fiber Bragg grating (TFBG) structures with tilted angles exceeding 45°. In contrast to the backward mode coupling mechanism of Bragg gratings with normal and small-tilting structures, the ex-45°TFBGs facilitate the light coupling to the forward propagating cladding modes. We have theoretically and experimentally examined the mode coupling transition of TFBGs with small, medium and large tilt angles. In particular, we have conducted experiments to investigate the spectra and far field distribution, and temperature, strain and refractive index sensitivities of ex-45° devices. It has been revealed that these ex-45°gratings exhibit ultra-low thermal sensitivity. As in-fiber devices, they may be superior to conventional Bragg and long period gratings when the low thermal cross sensitivity is required.

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Section: Introductionmentioning

confidence: 99%

Low Thermal Sensitivity Grating Devices Based on Ex-45$^{\circ}$ Tilting Structure Capable of Forward-Propagating Cladding Modes Coupling

Zhou

Zhang

Chen

et al. 2006

J. Lightwave Technol.

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“…, and considering a common SRI range from 1.3712 to 1.4735, the radiation radius, , can be calculated according to (5). Table II lists the calculated values of for two focal lengths: 45 and 155 mm.…”

Section: Refractive Index Sensing Functionmentioning

confidence: 99%

800 nm WDM Interrogation System for Strain, Temperature, and Refractive Index Sensing Based on Tilted Fiber Bragg Grating

et al. 2008

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Abstract-A low-cost high-resolution wavelength-division-multiplexing (WDM) interrogation system operating around 800 nm region with operational bandwidth up to 60 nm and resolution of 12.7 pm utilizing a tilted fiber Bragg grating (TFBG) and a CCDarray detector has been implemented. The system has been evaluated for interrogating fiber Bragg grating based strain, temperature sensors, giving sensitivities of 0.59 pm and 5.6 pm C, which are in good agreement with previously reported values. Furthermore, the system has been utilized to detect the refractive index change of sample liquids, demonstrating a capability of measuring index change as small as 10 5 . In addition, the vectorial expression of phase match condition and fabrication of TFBG have been discussed.Index Terms-Optical sensing, strain and temperature sensor, tilted fiber Bragg grating (TFBG), wavelength-division-multiplexing (WDM) interrogation system.

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