Harmonically and fundamentally mode-locked InGaAs-AlGaAs disk laser generating pulse repetition rates in the 100 GHz or pulse durations in the 100-fs range

Uwe Griebner; Peter Klopp; Martin Zorn; Markus Weyers

doi:10.1117/12.907313

14 February 2012 Harmonically and fundamentally mode-locked InGaAs-AlGaAs disk laser generating pulse repetition rates in the 100 GHz or pulse durations in the 100-fs range

Uwe Griebner, Peter Klopp, Martin Zorn, Markus Weyers

Author Affiliations +

Proceedings Volume 8242, Vertical External Cavity Surface Emitting Lasers (VECSELs) II; 824205 (2012) https://doi.org/10.1117/12.907313
Event: SPIE LASE, 2012, San Francisco, California, United States

Abstract

Femtosecond mode-locked semiconductor disk lasers (SDLs) have the potential to replace rather complex, expensive laser systems and to establish ultrashort-pulse applications outside of scientific laboratories. We report about almost Fourier-limited pulses with a duration close to 100 fs obtained in the single-pulse regime. The SDL cavity consisted of only three elements, an InGaAs/AlGaAs gain chip, a fast semiconductor saturable absorber mirror and an output coupler. The pulse in our mode-locked SDL was shaped mainly by the spectro-temporal behavior of saturable absorption and gain and the associated self-phase modulation. The group delay dispersion is small. Pulses as short as 107 fs were generated with a spectral width of 10.2 nm (FWHM), centered at 1030 nm. This results in a time-bandwidth product of ≈0.31, which is close to the transform-limit. The output power amounted to 3 mW at a pulse repetition rate of 5 GHz, corresponding to fundamental mode-locking. Harmonically mode-locked SDLs are capable of operating at much higher pulse repetition rates, which was also investigated. A maximum pulse repetition rate of 92 GHz was achieved while preserving the pulse duration shorter than 200 fs.

Citation Download Citation

Uwe Griebner, Peter Klopp, Martin Zorn, and Markus Weyers "Harmonically and fundamentally mode-locked InGaAs-AlGaAs disk laser generating pulse repetition rates in the 100 GHz or pulse durations in the 100-fs range", Proc. SPIE 8242, Vertical External Cavity Surface Emitting Lasers (VECSELs) II, 824205 (14 February 2012); https://doi.org/10.1117/12.907313

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