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Mid-Infrared supercontinuum is generated, using a germanium-doped silica fiber pumped by a Q-switched thulium-doped fiber laser. We obtained a relatively flat supercontinuum output in the range of Mid-Infrared by optimizing the length of the germanium-doped silica fiber and splicing a multi-mode fiber to improve the spatial coupling efficiency and damage threshold of the pump light. The long wavelength...
Mid-infrared Raman sources based on highly GeO2-doped silica-fibers pumped at ∼2.0 μm pulsed/cw lasers are studied. Supercontinuum generation up to 3.0 μm and cascaded Raman scattering up to 2.53 μm are achieved, respectively.
We experimentally demonstrate a magnetic field sensor based on long-period fiber grating (LPG) and magnetic fluid. Our proposed sensor possesses a high sensitivity of ∼0.154 dB/Gauss and a low measurement threshold of ∼7.4 Gauss.
The work function and surface energy of aluminum with different orientations are investigated by employing the DFT simulation. We mainly focus on two situations: pure aluminum surface and aluminum surface with impurities. The numerical results indicate that the work function of Al (100) is larger than Al (110). With the introduction of the impurities (carbon atoms), the work function increases because...
Travel time estimating is one of main content in Intelligent Transportation System(ITS), accurate travel time estimating is also crucial application in the route guidance and advanced traveler information systems. In this paper, travel tine estimating algorithm based on Fuzzy Radial Basis Function Neural networks (FRBFNN) is proposed, the neural networks input is currently traffic flow and occupancy...
Small nanodiamonds (22-172 atoms) of various shapes were studied by tight-binding molecular dynamics. It was found that spherical and cubic nanodiamonds with number of atoms more than 40 formed closed-shaped fullerene-like structures under graduate heating. The smallest fullerene-like structure obtained in the simulations contained 35 atoms. One of the observed fullerenes was an isomer of the C60...
Current vehicle navigation systems estimate the vehicle position from the Global Positioning System (GPS) signals and INS signals. However, because of the unknown GPS noise, the estimated position has an undesirable error. To solve this problem, a novel map matching method based on adaptive fuzzy-neural network (AFNN) is proposed in the paper, two important parameters are selected as the networks...
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