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A low-loss and highly birefringent polarization maintaining photonic crystal fiber has been fabricated. The fiber loss and modal birefringence at 1550 nm were 1.3 dB/km and 1.4x10 -3 , respectively.
We demonstrate the generation of symmetrical supercontinuum of over 40 nm in the 1.55 m region (1540 - 1580 nm) by injecting 1562 nm, 2.2 ps, 40 GHz optical pulses into a 200 m-long,… (More)
BACKGROUND AND PURPOSE Diffusion-weighted imaging (DWI) is usually done before administration of intravenous contrast agents. Repetition of DWI is occasionally necessary after administration, but the… (More)
A 170 fs transform-limited pulse train at 10 GHz has been successfully generated for the first time with a picosecond stable fibre laser and a dispersion-decreasing erbium-doped fibre amplifier which… (More)
We have investigated the resistance of current limiting elements in order to improve the working voltage. The element consisted of YBCO thin film on sapphire substrate and metal film on AlN… (More)
Effective stimulating coils were developed for magnetic excitation of cardiac muscle, and eddy currents produced by the coils were observed and calculated. The coils were flat solenoids made from… (More)
This study reports the application of the non-resonant type ultrasonic motor (NRUSM) to a 300 mm-stroke ultra-precision stage for the future nanoelectronics manufacturing. The advantages of the NRUSM… (More)