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We demonstrate sub-50 fs pulses generation directly from a 750 MHz repetition rate dispersion managed Yb: fiber ring laser by precision compensation of the intracavity dispersion.
We demonstrate 330 MHz repetition rate operation in a ring cavity Yb:fiber laser with novel and compact devices. The spectral bandwidth of the pulse is 30 nm and the dechirped pulse width is 48 fs.
A novel semiconductor saturable absorber based on high contrast grating is investigated for the first time. The extremely broad reflection band, low saturation fluence, and large design flexibility make it useful in mode-locked femtosecond lasers.
A novel ring cavity incorporated with both semiconductor saturable absorber mirror and grating pair is proposed and demonstrated in a Yb-doped fiber laser. The laser proves self-starting and delivers 84-fs pulses at 1038 nm with a spectral bandwidth of 22 nm. The pulse energy is 0.55 nJ.
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