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High-repetition-rate Cr:Nd:GSGG active-mirror amplifier
Optics Letters
|September 11, 2009
Summary
This study reports the first crystalline Cr:Nd:GSGG active-mirror amplifier, the largest aperture to date. It achieved a small-signal gain of 1.6 with minimal wavefront distortion and depolarization.
Area of Science:
- Laser physics
- Materials science
Background:
- Active-mirror amplifiers are crucial for high-energy laser systems.
- Crystalline hosts offer potential advantages over traditional glass media.
Purpose of the Study:
- To design, construct, and operate a novel crystalline Cr:Nd:GSGG active-mirror amplifier.
- To characterize its performance, including gain, wavefront quality, and depolarization.
Main Methods:
- Fabrication of a 3.8-cm clear-aperture Cr:Nd:GSGG crystal.
- Assembly and operation of an active-mirror amplifier system.
- Measurement of small-signal gain, wavefront distortion, and depolarization.
Main Results:
- Successful operation of the Cr:Nd:GSGG active-mirror amplifier.
- Achieved a small-signal gain of 1.6.
- Measured wavefront distortion below three waves of defocus at 10 Hz.
- Observed depolarization less than 2.5% at maximum power.
Conclusions:
- The crystalline Cr:Nd:GSGG active-mirror amplifier is a viable and high-performing laser component.
- This work represents a significant advancement in active-mirror amplifier technology.
- The demonstrated performance suggests potential for high-power laser applications.
