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Direct Imaging of Laser-driven Ultrafast Molecular Rotation
Published on: February 4, 2017
Dynamic chirp control and pulse compression for attosecond high-order harmonic emission.
Yinghui Zheng1, Zhinan Zeng, Pu Zou
1State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China.
Physical Review Letters
|August 8, 2009
Summary
We developed a new method to dynamically control chirp in attosecond harmonic pulses. This technique allows for precise chirp compensation, yielding nearly transform-limited attosecond pulse trains.
Area of Science:
- Quantum optics
- Attosecond science
- Nonlinear optics
Background:
- Attosecond harmonic pulses are crucial for ultrafast science.
- Intrinsic chirp limits the temporal resolution of attosecond pulses.
- Dynamic compensation of chirp is essential for advanced applications.
Purpose of the Study:
- To propose and demonstrate a novel scheme for dynamic chirp compensation of attosecond harmonic pulses.
- To enable continuous tuning of chirp from negative to positive values.
- To achieve nearly transform-limited attosecond pulse trains.
Main Methods:
- Introducing a weak second harmonic laser field to the main driving laser field.
- Adjusting the relative time delay between the two-color laser pulses.
- Experimental demonstration of chirp compensation in harmonic emission.
Main Results:
- Successful dynamic compensation of intrinsic chirp in attosecond harmonic pulses.
- Continuous tunability of chirp compensation from negative to positive.
- Generation of nearly transform-limited attosecond pulse trains.
Conclusions:
- The proposed scheme offers an effective method for dynamic chirp control.
- This technique advances the generation and application of high-quality attosecond pulses.
- Enables new possibilities in ultrafast spectroscopy and attosecond science.
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