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Optimization of a chirped-pulse amplification Nd:glass laser
I N Ross1, M Trentelman, C N Danson
1Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 OQX, UK.
Applied Optics
|February 12, 2008
Summary
Optimizing a chirped-pulse amplification Nd:glass laser system, including compressor geometry and mixed glasses, significantly boosts peak intensity. This research enhances focused laser intensity for advanced applications.
Area of Science:
- Laser Physics
- Materials Science
Background:
- Chirped-pulse amplification (CPA) systems are crucial for high-intensity laser generation.
- Nd:glass lasers are widely used in CPA due to their high energy storage capabilities.
Purpose of the Study:
- To optimize key features of a CPA Nd:glass laser for maximum focused intensity.
- To investigate the impact of compressor geometry and amplifier materials on laser performance.
Main Methods:
- Systematic analysis of compressor geometry (single- vs. double-pass).
- Evaluation of system aberrations and their mitigation.
- Utilizing mixed phosphate-silicate glass in the amplifier chain.
Main Results:
- A reduction in pulse duration from 380 fs to 237 fs was achieved with a mixed glass system in a single-pass compressor.
- This optimization led to a 44% increase in peak intensity at the beam focus.
- Calculations for both single- and double-pass compressors with 450-mm gratings were presented.
Conclusions:
- Mixed glass systems offer significant advantages over pure phosphate glasses for CPA Nd:glass lasers.
- Optimizing compressor design and amplifier materials is critical for achieving ultra-high focused laser intensities.
