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We report on a passively mode-locked erbium-doped fiber laser with a repetition rate as low as 1.2 MHz in a strong normal dispersion regime. The laser was mode locked via spectral filtering. It generated a pulse with large and linear chirp that can be dechirped to 430 fs outside the cavity.
We report a simplified mode-locked Er fiber laser in normal dispersion with birefringence filters compared with the one with nonlinear polarization evolution mechanism.
We demonstrate the long linear-cavity with ultra-low repetition rate Ytterbium-doped fiber laser mode-locked by a SESAM. Output pulses were highly-chirped, with energies high to 75.2 nJ and minimum repetition rate was 191 kHz.
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