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High-power sub-100-fs UV pulse generation from a spectrally controlled KrF laser
Y Nabekawa1, Y Kuramoto, T Sekikawa
1Institute for Solid State Physics, University of Tokyo, Roppongi 7-22-1, Minato-ku, Tokyo 106, Japan.
Optics Letters
|May 15, 1997
Summary
Researchers generated high-power, sub-100-femtosecond ultraviolet pulses using a KrF excimer laser. This advancement in laser technology achieved 72-fs pulses with high spectral control and amplified output power.
Area of Science:
- Laser Physics
- Ultrafast Optics
- Quantum Electronics
Background:
- Excimer lasers, such as KrF, are crucial for generating high-energy ultraviolet (UV) pulses.
- Achieving ultrashort pulse durations (sub-100 femtoseconds) is essential for various high-resolution applications.
- Spectral control and pulse amplification techniques are key to enhancing laser performance.
Purpose of the Study:
- To generate high-power sub-100-femtosecond ultraviolet pulses from a KrF excimer laser.
- To investigate the impact of spectral control and chirped-pulse amplification on pulse duration and power.
- To achieve nearly transform-limited pulses for advanced applications.
Main Methods:
- Utilized spectral control techniques to broaden the laser spectrum.
- Employed chirped-pulse amplification (CPA) to achieve high peak powers.
- Characterized the output pulses for duration and energy.
Main Results:
- Successfully generated sub-100-femtosecond UV pulses.
- Broadened the spectral width to 1.6 nm, resulting in 72-femtosecond pulses.
- Achieved average output powers of 0.6 W (72 fs) and 1.2 W (110 fs) at 1 kHz repetition rate.
Conclusions:
- High-power, ultrashort UV pulses can be effectively generated using spectral control and CPA with a KrF excimer laser.
- The developed method yields nearly transform-limited pulses, suitable for demanding scientific investigations.
- This technique advances the capabilities of UV laser systems for ultrafast science.
