Results 61 to 70 of about 120,889 (204)
Transverse Load and Temperature Sensing Using Multiplexed Long-Period Fiber Gratings
Photonics, 2020 The simultaneous measurement of transverse load and temperature using two long-period fiber gratings multiplexed in the wavelength domain is presented experimentally.
Ismael Torres-Gómez +4 more
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Optical Fiber Interferometers Based on Arc-Induced Long Period Gratings at INESC TEC
Sensors, 2021 In this work, we review the most important achievements of an INESC TEC long-period-grating-based fiber optic Michelson and Mach–Zehnder configuration modal interferometer with coherence addressing and heterodyne interrogation as a sensing structure for ...
Paulo Caldas, Gaspar Rego
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A tunable radiation source by coupling laser-plasma-generated electrons to a periodic structure [PDF]
, 2011 Near-infrared radiation around 1000 nm generated from the interaction of a high-density MeV electron beam, obtained by impinging an intense ultrashort laser pulse on a solid target, with a metal grating is observed experimentally.
A. Kon +13 more
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Widely tunable long-period waveguide grating couplers
Optics Express, 2006 We demonstrate experimentally two widely tunable optical couplers formed with parallel long-period polymer waveguide gratings. One of the couplers consists of two parallel gratings and shows a peak coupling efficiency of ~34%. The resonance wavelength of the coupler can be tuned thermally with a sensitivity of 4.7 nm/ degrees C.
Y, Bai, Q, Liu, K P, Lor, K S, Chiang
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Chirped gratings in integrated optics [PDF]
, 1977 Gratings with variable periods (chirped gratings) have been fabricated by recording the interference pattern of a collimated laser beam with a converging beam generated by a cylindrical lens.
Katzir, A. +3 more
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Long-period gratings in polymer ridge waveguides
Optics Express, 2005 We report the design and fabrication of long-period waveguide gratings (LPWGs) in benzocyclobutene (BCB) ridge waveguides. We apply an accurate perturbation theory to analyze the LPWGs. In particular, the phase-matching condition, the coupling coefficients, the temperature dependence of the resonance wavelength, the bandwidth, and the polarization ...
Q, Liu, K, Chiang, K, Lor
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Long-Period Grating with Asymmetrical Modulation for Curvature Sensing
Applied SciencesWe propose and demonstrate a curvature sensor based on long-period fiber grating (LPFG) with asymmetric index modulation. The LPFG is fabricated in single-mode fiber with femtosecond laser micromachining.
Lan Su +5 more
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Sensing Characteristics of Side-Hole Fiber-Based Long-Period Grating
Advances in Materials Science and Engineering, 2013 Long-period gratings (LPGs) have been fabricated in a side-hole fiber (SHF) by using a pulsed CO2 laser. Sensing characteristics of this SHF-LPG to temperature surrounding refractive index and bend have been investigated.
Yi Xin +5 more
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An Ultrasensitive Long-Period Fiber Grating-Based Refractive Index Sensor with Long Wavelengths
Sensors, 2016 The response of a novel long-period fiber grating (LPFG) with a period of 180 µm to a surrounding refractive index (RI) was investigated. The results displayed that, with the increase in RI of the surrounding media of cladding glass in the grating region,
Qiu-Shun Li +8 more
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Applied Sciences, 2022 Aiming at the shortcomings of the traditional infrared polarization imaging device, such as large volume, complex structure, difficult registration, and inability to recognize moving targets, this paper proposes an infrared polarization imaging method ...
Qiang Fu +7 more
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