Feng-Zhou Liu

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We demonstrate pulsewidth-stretchable Er 3+-doped femtosecond mode-locked fiber lasers by incorporating a tunable short-pass edge filter into the ring cavity. Pulsewidth stretch ratio of 3.53 (882/250) can be efficiently achieved under a temperature variation of 4ºC. 1. INTRODUCTION Femtosecond mode-locked fiber lasers (FMLLs) have played important roles in(More)
We demonstrate highly efficient pulse stretching in Er(3+)-doped femtosecond mode-locked fiber lasers by tailoring cavity dispersion using an intracavity short-pass edge filter. The cavity dispersion is preset at around zero to obtain the shortest pulsewidth. When the cutoff wavelength of the short-pass edge filter is thermo-optically tuned to overlap the(More)
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