Gain-Matched Output Couplers for Efficient Kerr-Lens Mode-Locking of Low-Cost and High-Peak Power Cr:LiSAF Lasers

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2015
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Cihan, Can
Beyatli, Ersen
Canbaz, Ferda
Chen, Li-Jin
Sumpf, Bernd
Erbert, Götz
Kärtner, Franz X.
Sennaroglu, Alphan
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European Union (EU): 290876
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Ultrafast Quantum Physics in Amplitude and Phase - UltraPhase, ERC Advanced Grant
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IEEE journal of selected topics in quantum electronics. 2015, 21(1), 1100712. ISSN 1077-260X. Available under: doi: 10.1109/JSTQE.2014.2359540
Zusammenfassung

We present a detailed investigation of Kerr-lens mode-locking in diode-pumped Cr:LiSAF lasers employing gain-matched output couplers (GMOCs). Single-mode diodes (660 nm, 130 mW) and tapered diodes (685 nm, 1 W) were investigated as diode pump sources. We have shown that, by reducing the gain-filtering effect, GMOC enhances the effective self-amplitude modulation depth and provides a significant improvement in both efficiency and robustness of KLM operation. From the single-mode diode pumped system, 13 fs pulses with an average power of 25 mW and a peak power 25 kW have been generated at an incident pump power of only 120 mW (21% optical-to-optical conversion efficiency). The tapered diode pumped Cr:LiSAF oscillator provided pulses as short as 14.5 fs with 106-mW average power and 60-kW peak power at an incident pump power of 940 mW (11% optical-to-optical conversion efficiency). A femtosecond tuning range extending from 807 to 919 nm was also realized with sub-50-fs long pulses. To our knowledge, demonstrated optical-to-optical conversion efficiencies, peak powers and fs tuning ranges are record results for Cr:LiSAF laser oscillators. The obtainable pulsewidth and fs tuning range are currently limited by the dispersion/reflectivity bandwidth of the available optics.

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ISO 690CIHAN, Can, Ersen BEYATLI, Ferda CANBAZ, Li-Jin CHEN, Bernd SUMPF, Götz ERBERT, Alfred LEITENSTORFER, Franz X. KÄRTNER, Alphan SENNAROGLU, Umit DEMIRBAS, 2015. Gain-Matched Output Couplers for Efficient Kerr-Lens Mode-Locking of Low-Cost and High-Peak Power Cr:LiSAF Lasers. In: IEEE journal of selected topics in quantum electronics. 2015, 21(1), 1100712. ISSN 1077-260X. Available under: doi: 10.1109/JSTQE.2014.2359540
BibTex
@article{Cihan2015GainM-29474,
  year={2015},
  doi={10.1109/JSTQE.2014.2359540},
  title={Gain-Matched Output Couplers for Efficient Kerr-Lens Mode-Locking of Low-Cost and High-Peak Power Cr:LiSAF Lasers},
  number={1},
  volume={21},
  issn={1077-260X},
  journal={IEEE journal of selected topics in quantum electronics},
  author={Cihan, Can and Beyatli, Ersen and Canbaz, Ferda and Chen, Li-Jin and Sumpf, Bernd and Erbert, Götz and Leitenstorfer, Alfred and Kärtner, Franz X. and Sennaroglu, Alphan and Demirbas, Umit},
  note={Article Number: 1100712}
}
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