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Impacts of random phase offset in coupled-mode theory and autocorrelation function in coupled-power theory on crosstalk of multi-core fibers are investigated for the first time. Simulation results are in good agreement with measurement results.
A novel technique to suppress a higher-order mode in bent large-mode-area multi-cladding fibers is presented. 2-dB suppression of LP02 mode is observed on a fabricated double-cladding fiber with 140-mm diameter bend.
A novel technique to suppress the higher-order mode in bent LMA triple-cladding fibers is proposed. It is shown that the higher-order mode can be coupled to a cladding mode with only an adjustment of the bending diameter.
We observed a new fiber fuse propagation mode in HAF with an approximately 30 times larger period than that in SMF. We made the first observation of a new fiber fuse threshold power (upper threshold).
A novel technique to suppress the higher-order mode in a bent large-mode-area triple-cladding fiber is experimentally presented. 3-dB suppression of LP02 mode is observed on a fabricated triple-cladding fiber with 130-mm diameter bend.
Linearly-polarized lasing at 1180 nm is demonstrated by utilizing polarization maintaining Yb-doped solid photonic bandgap fiber. The extinction ratio of the output light between two lineary-polarized lights is more than 20 dB.
A novel hole-assisted fiber with single-mode propagation down to 1.0 µm and relatively low macro-bending loss up to L band is fabricated. The fiber also has low loss and large effective area properties.
We demonstrate a silica-based solid photonic band gap fibre with attenuation below 20 dB/km at 1520 nm. The bandwidth is over 400 nm and covers the entire telecom wavelength range from O-band to U-band.
A novel graded-index multimode fibre is proposed. Co-doping appropriately fluorine and germanium into silica makes the optimum index parameter alpha of the fibre much less dependent on wavelength and results in a wide operation window.
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