Sub-500-fs soliton-like pulse in a passively mode-locked broadband surface-emitting laser with 100 mW average power

Garnache, A.; Hoogland, S.; Tropper, A. C.; Sagnes, I.; Saint-Girons, G.; Roberts, J. S.
May 2002
Applied Physics Letters;5/27/2002, Vol. 80 Issue 21, p3892
Academic Journal
We report on femtosecond operation of a broadband diode-pumped external-cavity surface-emitting semiconductor laser, passively mode locked with a fast quantum-well Semiconductor Saturable Absorber Mirror grown at 735 °C. We obtained 477 fs pulses at 1.21 GHz. The average output power is 100 mW at 1040 nm, the pulse peak power 152 W, with ∼ 1 W of 830 nm pump. The rf spectrum shows a linewidth < 50 kHz at the noise level (- 65 dB). We believe that the group-delay dispersion is compensated by the negative self-phase modulation in the absorber structure, leading to soliton-like mode locking. This system requires no additional technological step after the growth of the structures.


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