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We propose a technique for measuring properties of cores in a multi-core fibre (MCF) simultaneously by using OTDR and fan-in/out devices. Mode field diameter and relative-index difference of cores in the MCF are successfully estimated by present method.
The inter-core crosstalk of a fabricated few-mode multicore fibre is theoretically and experimentally investigated. By changing the direction of the LP11 mode, the crosstalk between the LP11 mode and the LP01 mode decreased by more than 10 dB.
A technique is proposed for measuring mode field diameter of LP01 mode and relative-index difference of a fiber link composed of two mode fibers using the OTDR. Longitudinal fiber parameters of the fiber link were successfully estimated by our technique.
We propose a multi-core fiber which accommodates a number of trench index cores with small index difference of inner cladding. We clarify theoretically that our multi-core fiber design can reduce the crosstalk.
The bending loss properties of step-index core dispersion-shifted fiber with a trench index profile are investigated theoretically. It is revealed that the depth and position of the trench have a great effect on the bending properties and mode field diameter.
Temperature dependence of the chromatic dispersion distribution of the fiber is examined using OTDR for the first time. The relationship between MFD and relative-index difference due to temperature change is also clarified experimentally.
The polarization dependence of the Raman gain efficiency distribution in a single-mode fiber is investigated experimentally and theoretically. It is shown that the polarization states of the signal and pump lights have an effect on the Raman gain efficiency distribution.
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