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Gürel K, Wittwer VJ, Hoffmann M, et al. Green-diode-pumped femtosecond Ti:Sapphire laser with up to 450 mW average power. Opt Express. 2015;23(23):30043-8doi: 10.1364/OE.23.030043.
Gürel, K., Wittwer, V. J., Hoffmann, M., Saraceno, C. J., Hakobyan, S., Resan, B., Rohrbacher, A., Weingarten, K., Schilt, S., & Südmeyer, T. (2015). Green-diode-pumped femtosecond Ti:Sapphire laser with up to 450 mW average power. Optics express, 23(23), 30043-8. https://doi.org/10.1364/OE.23.030043
Gürel, K, et al. "Green-diode-pumped femtosecond Ti:Sapphire laser with up to 450 mW average power." Optics express vol. 23,23 (2015): 30043-8. doi: https://doi.org/10.1364/OE.23.030043
Gürel K, Wittwer VJ, Hoffmann M, Saraceno CJ, Hakobyan S, Resan B, Rohrbacher A, Weingarten K, Schilt S, Südmeyer T. Green-diode-pumped femtosecond Ti:Sapphire laser with up to 450 mW average power. Opt Express. 2015 Nov 16;23(23):30043-8. doi: 10.1364/OE.23.030043. PMID: 26698485.
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Opt Express. 2015 Nov 16;23(23):30043-8. doi: 10.1364/OE.23.030043.

Green-diode-pumped femtosecond Ti:Sapphire laser with up to 450 mW average power.

Optics express

K Gürel, V J Wittwer, M Hoffmann, C J Saraceno, S Hakobyan, B Resan, A Rohrbacher, K Weingarten, S Schilt, T Südmeyer

PMID: 26698485 DOI: 10.1364/OE.23.030043

Abstract

We investigate power-scaling of green-diode-pumped Ti:Sapphire lasers in continuous-wave (CW) and mode-locked operation. In a first configuration with a total pump power of up to 2 W incident onto the crystal, we achieved a CW power of up to 440 mW and self-starting mode-locking with up to 200 mW average power in 68-fs pulses using semiconductor saturable absorber mirror (SESAM) as saturable absorber. In a second configuration with up to 3 W of pump power incident onto the crystal, we achieved up to 650 mW in CW operation and up to 450 mW in 58-fs pulses using Kerr-lens mode-locking (KLM). The shortest pulse duration was 39 fs, which was achieved at 350 mW average power using KLM. The mode-locked laser generates a pulse train at repetition rates around 400 MHz. No complex cooling system is required: neither the SESAM nor the Ti:Sapphire crystal is actively cooled, only air cooling is applied to the pump diodes using a small fan. Because of mass production for laser displays, we expect that prices for green laser diodes will become very favorable in the near future, opening the door for low-cost Ti:Sapphire lasers. This will be highly attractive for potential mass applications such as biomedical imaging and sensing.

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