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We report a mode-coupling measurement method at a splice point between few-mode fibers using an OTDR. The mode coupling between LP01-LP11 modes measured at the splice point agreed well with measurements using the transmission method.
We demonstrate a single-channel 1.92 Tbit/s, 64 QAM coherent pulse OTDM transmission over 150 km. The QAM multiplicity was increased up to 64 by adopting a frequency domain equalization scheme to enhance waveform-distortion compensation.
A new method for measuring mode-couplings along a multi-core fiber (MCF) is proposed that uses a multi-channel OTDR technique. Using a synchronous seven-channel OTDR, we have successfully measured the mode-couplings along a 2.9 km-long MCF.
We report a 10 GHz regeneratively and harmonically mode-locked Yb fiber laser capable of dispersion-managed soliton operation at 1.1 μm. A 2.5 ps optical pulse with a timing jitter of 134 fs was successfully generated.
We report a polarization-maintaining λ/4-shifted DFB Er-doped fiber laser with a ring cavity configuration. A linewidth as narrow as 6 kHz and relaxation-oscillation-free noise characteristics are achieved with a ring cavity length of 57 m.
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