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This paper reports the method and results of amplifying the power output of a piezoelectric energy harvester excited by random vibrations. The amplification is achieved by applying a dual-mass-spring system. A maximum power amplification of 80 times has been experimentally demonstrated. The generated power output from a piezoelectric energy harvester, when excited by as-measured random vibrations,...
Terahertz time-domain spectroscopy is used to measure the temperature-dependent refractive index of heavy oils down to 80 K. Evidence for a glass transition is observed, providing insight into the viscosity-temperature behavior of heavy oils.
We attempted to grow CLBO crystals in dry atmophere. We estimated the OH impurities in the crystal by non-polarized Fourier transform infrared spectrometer and measured the laser damage tolerance by 266-nm high repetition pulse laser.
In this study, we report our recent research in fabrication of microfluidic channels inside bulk Foturan photosensitive glass by femtoseond (fs) laser direct writing. First, a latent image of microchannel was written inside the glass using a fs laser. Then, a visible image of microchannel was obtained when the sample was subjected to a programmed thermal treatment. Next, the sample was soaked in a...
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