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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

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High-energy, stable single-frequency Ho:YAG ceramic amplifier system.

Yixuan Zhang, Chunqing Gao, Qing Wang

|December 8, 2017

Summary

Researchers developed a high-energy, single-frequency Holmium-doped Yttrium Aluminum Garnet (Ho:YAG) ceramic laser. This advanced system achieved a record 55.64 mJ pulse energy, advancing laser technology.

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Area of Science:

Laser Physics
Materials Science

Background:

Holmium-doped Yttrium Aluminum Garnet (Ho:YAG) lasers are crucial for various applications.
Achieving high-energy, single-frequency output from Ho:YAG lasers remains a significant challenge.

Purpose of the Study:

To demonstrate a novel two-stage master oscillator and power amplifier (MOPA) system using Ho:YAG ceramic.
To achieve high single-frequency pulse energy at 2090 nm.

Main Methods:

Utilized a Q-switched Ho:YAG ceramic master oscillator and power amplifier (MOPA) configuration.
Employed a two-stage amplification design.
Measured spectral characteristics using a heterodyne technique.

Main Results:

Achieved a maximum single-frequency pulse energy of 55.64 mJ at a 200 Hz repetition rate.
The laser operated at a wavelength of 2090 nm.
Measured spectral half-width of 3.96 MHz, confirming single-frequency operation.

Conclusions:

The developed Ho:YAG ceramic MOPA system represents a significant advancement in high-energy, single-frequency laser sources.
This work establishes a new record for single-frequency output energy from a Ho:YAG laser, opening possibilities for new applications.