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We experimentally demonstrate transmission over a novel multicore fiber with 9 cores arranged in 3 groups of 3 cores, where strong coupling occurs within the groups and weak couplings between groups. We transmitted over 2500 km in a single group at a time and 715 km when all 9 cores are used. Low-loss 3D waveguides are used as couplers.
We experimentally demonstrate multiple-input-multiple-output transmission of a combined 3-space-, and 2-polarization-, and 5-wavelength-division multiplex in a 3-core microstructured fiber over 4200 km. This is the record transmission distance for spatial-division multiplexing in a fiber.
We experimentally demonstrate simultaneous transmission of three spatially multiplexed 56-Gb/s polarization-division-multiplex quadrature phase-shift keying (PDM-QPSK) channels over 24 km of a strongly coupled three-core fiber. The resulting crosstalk of about is almost completely removed by coherent multiple-input multiple-output (MIMO) processing.
Inter-core crosstalk of fabricated multi-core fiber was statistically evaluated to be less than -77.6 dB after 17.4-km propagation for λ=1550 nm using newly-developed method. The crosstalk was estimated to be less than -30 dB after 10,000 km.
We demonstrate record 109-Tb/s transmission of spatial division multiplexed (SDM) signals over 16.8 km using a seven-core fiber. Each SDM channel contains 97 WDM channels on a 100-GHz grid and 2×86-Gb/s polarization-multiplexed QPSK signals.
We designed and fabricated a multi-core fiber whose attenuation is less than 0.18 dB/km and effective area is about 80 μm2. Crosstalk was observed be less than -55.5 dB after 17.6 km propagation.
We experimentally demonstrate transmission of 6 mode-multiplexed 20-Gbd-QPSK signals over 1200 km of three-core microstructured fiber (3C-MSF). An aggregate single-wavelength capacity of 240 Gbit/s is recovered by off-line 6×6 coherent multiple-input multiple-output (MIMO) digital signal processing.
Flat and single mode supercontinuum generation spanning from 700 to 2350 nm was demonstrated using a nanosecond microchip laser and conventional cut-off shifted SMF. This configuration is attractive as a simple and low-cost light source.
We observed spectral shifts for short heated lengths of photonic bandgap fibers based on high-index rods. Shifts are observed in even shorter lengths if the fiber is bent. Application as alternative distributed sensors is envisaged.
An Er-doped all-solid microstructured fiber with an enhanced gain of 1.8 dB at 1.60 mum is successfully demonstrated by introducing the high-index periodic structure to filter out the ASE shorter than 1.56 mum.
We report on the design and fabrication of all-solid photonic bandgap fibers consisting of two different high-index rods sizes in the cladding, allowing us the control of transmission band over nanometer range for various applications.
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