Sub-100 femtosecond pulses from a SESAM modelocked thin disk laser |
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Authors: | Email author" target="_blank">C?J?SaracenoEmail author O?H?Heckl C?R?E?Baer C?Schriber M?Golling K?Beil C?Kr?nkel T?Südmeyer G?Huber U?Keller |
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Institution: | 1.Department of Physics, Institute for Quantum Electronics,ETH Zurich,Zurich,Switzerland;2.Institute of Laser-Physics,University of Hamburg,Hamburg,Germany;3.Department of Physics,University of Neuchatel,Neuchatel,Switzerland |
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Abstract: | We present the first passively modelocked thin disk laser (TDL) with sub-100-fs pulse duration using the broadband sesquioxide
gain material Yb:LuScO3 and an optimized SEmiconductor Saturable Absorber Mirror (SESAM). In this proof-of-principle experiment, we obtained 5.1 W
of average power at a repetition rate of 77.5 MHz and a pulse duration of 96 fs. We carefully explored and optimized the different
parameters on the soliton pulse formation process for the generation of short pulses. In particular, SESAMs combining fast
recovery time, high modulation depth and low nonsaturable losses proved crucial to achieve this result even though they are
expected to only play a minor role in soliton modelocking. To our knowledge, these are the shortest pulses ever obtained with
a modelocked TDL, reaching for the first time the sub-100-fs milestone. This result opens the door to sub-100-fs oscillators
with substantially higher power levels in the near future. |
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