Femtosecond microjoule pulses with 15.8 W average power from a passively mode-locked diode-pumped Yb:YAG thin-disk laser

Summary form only given. Femtosecond laser sources with multi-watt average powers and multi-kW peak powers are required for many applications. We have found a power-scalable concept to achieve this kind of performance directly with a diode-pumped passively mode-locked laser oscillator, not requiring...

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Hauptverfasser: Aus der Au, J., Spuhler, G.J., Paschotta, R., Keller, U., Moser, M., Erhard, S., Karszewski, M., Giesen, A.
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creator Aus der Au, J.
Spuhler, G.J.
Paschotta, R.
Keller, U.
Moser, M.
Erhard, S.
Karszewski, M.
Giesen, A.
description Summary form only given. Femtosecond laser sources with multi-watt average powers and multi-kW peak powers are required for many applications. We have found a power-scalable concept to achieve this kind of performance directly with a diode-pumped passively mode-locked laser oscillator, not requiring any amplification stages. The concept is based on a Yb:YAG thin-disk laser, which in continuous wave (CW) operation has delivered output powers of up to /spl ap/100 W in a diffraction-limited beam. We have now for the first time to our knowledge passively mode-locked such a laser using a semiconductor saturable absorber mirror (SESAM). The laser head, which had generated 20 W CW near-room-temperature produced 680-fs pulses at 1030 nm with 15.8 W of average power in two nearly transform-limited beams (time-bandwidth product 0.33). This is to our knowledge the highest average power reported for a laser oscillator (without amplifier) in the subpicosecond regime. The pulse repetition rate was 15 MHz. Pulse energies of 2/spl times/0.5 /spl mu/J and peak powers as high as 2 X 680 kW were achieved. Autocorrelation and optical spectrum are given. To obtain subpicosecond pulse durations, we operated the laser in the soliton mode-locked regime using a Gires-Tournois Interferometer (GTI). The high tendency of Yb:YAG for Q-switched mode-locking was strongly suppressed by the small laser mode size in the thin-disk laser head, the low repetition rate, and a stabilizing effect resulting from soliton mode-locking.
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Technical Digest. Postconference Edition. TOPS Vol.39 (IEEE Cat. No.00CH37088)</btitle><stitle>CLEO</stitle><date>2000</date><risdate>2000</risdate><spage>82</spage><epage>83</epage><pages>82-83</pages><isbn>1557526346</isbn><isbn>9781557526342</isbn><abstract>Summary form only given. Femtosecond laser sources with multi-watt average powers and multi-kW peak powers are required for many applications. We have found a power-scalable concept to achieve this kind of performance directly with a diode-pumped passively mode-locked laser oscillator, not requiring any amplification stages. The concept is based on a Yb:YAG thin-disk laser, which in continuous wave (CW) operation has delivered output powers of up to /spl ap/100 W in a diffraction-limited beam. We have now for the first time to our knowledge passively mode-locked such a laser using a semiconductor saturable absorber mirror (SESAM). 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source IEEE Electronic Library (IEL) Conference Proceedings
subjects Laser beams
Laser mode locking
Optical pulse generation
Optical pulses
Oscillators
Power generation
Power lasers
Pulse amplifiers
Semiconductor lasers
Ultrafast optics
title Femtosecond microjoule pulses with 15.8 W average power from a passively mode-locked diode-pumped Yb:YAG thin-disk laser
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