Summary
We demonstrate the implementation of a feedback controlled pulse shaping device in a femtosecond high-power Ti:sapphire laser system. The laser system consists of a mirror dispersion controlled oscillator and a multipass amplifier with a pairing double prism compressor. The system provides pulses with a duration of 30 fs and an energy of up to 1.2 mJ per pulse at 1 kHz repetition rate. The phase distorted output pulses are phase modulated with a high resolution spatial light modulator (SLM). The pulse shaper consists of an all-reflective zero-dispersion compressor equipped with a liquid crystal array. For adaptive compression of the amplified pulses a feedback loop is implemented. A two-photon process is used to monitor the temporal pulse characteristics. To achieve the shortest possible pulse an evolutionary algorithm controls the pulse shaper utilizing the two-photon signal as feedback. With this set-up transform limited pulses are achieved. Detailed investigations of algorithm parameters and their effect on convergence behaviour have been performed and are compared with the experimental findings.
Keywords
- Femtosecond Laser Pulse
- Spatial Light Modulator
- Spectral Phase
- Acousto Optic Modulator
- Reproduction Probability
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Witting, T., Tsilimis, G., Kutzner, J., Zacharias, H., Köller, M., Maurer, H. (2005). Adaptive Shaping of High-Power Broadband Femtosecond Laser Pulses. In: Wittrock, U. (eds) Adaptive Optics for Industry and Medicine. Springer Proceedings in Physics, vol 102. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-28867-8_28
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DOI: https://doi.org/10.1007/3-540-28867-8_28
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-23978-9
Online ISBN: 978-3-540-28867-1
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