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When the polarization of terahertz (THz) light is measured with THz time-domain spectroscopy (TDS) by switching the polarization angle of THz light, it is preferable that intensities of pump and probe lights are almost constant. Pump and probe lights, which are produced through dividing a femto second (fs) laser pulses by a beam-splitter, must be correlated with orientations of THz emitter and detector...
Effects of zinc oxide (ZnO) nanopowder dopant, on the acoustical and physical properties of silicone (Q) rubber have been investigated, in order to develop a low-acoustic attenuation, low sound velocity, and high-mechanical properties lens material for medical array probes. The ZnO-doped Q rubbers showed acoustic impedance (Z) = 1.29 to 1.46 times 106 kg middot m-2s-1, acoustic attenuation = 0.54...
High-performance GalnNAs/GaAs triple quantum well (TQW) edge-emitting lasers were demonstrated. Al-free molecular beam epitaxy (MBE) is effective to prevent any Al impurity or contamination, which had appeared in previous GalnNAs materials, leading to a significant improvement in the photoluminescence intensity. By using this growth method, we have successfully grown highly-strained GalnNAs/GaAs TQW...
Uncooled 10-Gbit/s, 80- km SMF transmission was demonstrated for the first time using a 1.55-μm InGaAlAs EA/DFB laser. A power penalty below 2-dB was achieved over a wide temperature range from 15°C to 95°C.
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