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Wavelength-tunable mode-locked fiber laser based on dispersion tuning at 1.5 mum and 1.3 mum bands are reported. We realized wide tuning range of over 120 nm and fast tuning rate of over 20 kHz.
We show that the in-channel dispersion of the chirped sampled fiber Bragg gratings can be tuned by controlling the duty ratio, thus various in-channel dispersion values can be realized using a single chirped phase mask.
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