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Simultaneous contrast improvement and temporal compression using divided-pulse nonlinear compression
Optics Express
|April 27, 2022
Summary
This study demonstrates divided-pulse nonlinear compression to enhance laser pulse temporal contrast and shorten pulse duration. The method significantly improves contrast and shortens pulses, offering a valuable technique for high-power laser development.
Area of Science:
- Optics and Photonics
- Laser Physics
- Nonlinear Optics
Background:
- High-power laser systems, particularly Ytterbium (Yb) regenerative amplifiers, often suffer from poor temporal contrast due to prepulses.
- Longer pulse durations in these amplifiers limit their peak power and application potential.
Purpose of the Study:
- To experimentally demonstrate a method for improving laser pulse temporal contrast and simultaneously compressing pulse duration.
- To assess the efficiency and effectiveness of divided-pulse nonlinear compression for laser pulse enhancement.
Main Methods:
- Utilizing divided-pulse nonlinear compression technique.
- Experimentally measuring temporal contrast improvement on a nanosecond timescale.
- Quantifying pulse duration changes from picoseconds to femtoseconds.
Main Results:
- Achieved a temporal contrast improvement of nearly four orders of magnitude.
- Successfully compressed laser pulses from 1.2 picoseconds (ps) to 187 femtoseconds (fs).
- Demonstrated a competitive method efficiency of 72% for the main pulse.
Conclusions:
- Divided-pulse nonlinear compression is an effective technique for enhancing laser pulse temporal contrast and duration.
- This method shows significant promise for advancing the development of high-power Yb regenerative amplifiers.
- The technique addresses key limitations of prepulses and long pulse durations in advanced laser systems.
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