Optical time-division demultiplexing of 160-Gbit/s optical signals is demonstrated by using a 2-m-long dispersion-shifted Bi2O3-based photonic crystal fiber. Power penalties are less than 6 dB for all 10-Gbit/s tributaries.
We developed a conventional step-index type highly nonlinear bismuth oxide-based glass fiber. This fiber exhibits high nonlinearity (γ =1360 W−1km−1) because of the high nonlinearity of the glass material and the small effective core area.
We demonstrate the use of an only 40-cm-long Bi/sub 2/O/sub 3/-based nonlinear fiber with /spl gamma/=1100 W/sup -1/km/sup -1/ to obtain FWM-based wavelength conversion. Error-free conversion of 40-Gbit/s NRZ signals over /spl sim/10 nm is achieved without any SBS suppression scheme.
The implementation of all-optical logic gates of XOR and AND operable at 40 Gbit/s using polarisation switching within only 1 m length of a fabricated Bi-NLF is experimentally demonstrated. The two logic functions are obtained in a single device by simply changing the polarisation states of input signals relative to that of a probe beam.
We explore the ultimate potential offered by state-of-the-art Bismuth oxide-based optical fiber technology in a high-speed optical phase-locked loop-based clock recovery subsystem for an optical time-division multiplexed (OTDM) signal, in which the use of optical fiber-based devices has been considered to be inappropriate due to its tight requirement of short optical loop length. Here, we experimentally demonstrate the implementation of a compact all-fiber-based OTDM receiver incorporating both clock recovery and demultiplexing functions by use of short lengths of Bismuth oxide-based nonlinear fiber and erbium-doped Bismuth oxide fiber. Successful clock recovery and subsequent error-free demultiplexing are readily achieved at a data rate of 80 Gb/s. The clock recovery subsystem is also shown to be operable at 160 Gb/s.
A new dosimetry system, WAZA-ARI, is being developed to estimate the radiation dose in Computed Tomography (CT) examinations in Japan.Dose estimation in WAZA-ARI utilizes organ dose data that are derived by Monte Carlo calculations using the Particle and Heavy Ion Transport code System (PHITS).A Japanese adult male phantom, JM phantom, has been adapted as a reference human model in the calculations, because the physique and inner organ masses agree well with the average values for Japanese adult males.However, since each patient has individual physical characteristics, the effect of a patient's body configuration on organ doses was studied by utilizing PHITS with another Japanese male model and the International Commission on Radiological Protection (ICRP) reference phantom.In addition, this paper describes computation conditions for the three human models, which were constructed in the form of voxel phantoms with different resolutions.Differences were observable among the phantoms in the dependences of the organ doses per air kerma on the position of the x-ray source running over the patient's body.The source model definition, however, more strongly affected the patient doses in the same phantom.
We developed a conventional step-index type highly nonlinear bismuth oxide-based glass fiber. This fiber exhibits high nonlinearity (γ =1360 W−1km−1) because of the high nonlinearity of the glass material and the small effective core area.
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