Broadband low-loss semiconductor saturable absorber mirrors (SESAMs) in the 1.55-/spl mu/m wavelength range were monolithically grown by solid source molecular beam epitaxy using a Burstein-Moss blue-shifted Ga/sub 0.47/In/sub 0.53/As-InP distributed Bragg reflector. Absorbers with fast and slow temporal responses were used to start up and to stabilize a stretched pulse mode-locked fiber laser. Reliable operation at a fundamental repetition rate was obtained without multiple pulse break-up with pulse energy of over 250 pJ.
Xiang et al. (Mon,) studied this question.
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