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Dual-frequency pulse laser based on acousto-optic modulation.

Yuhe Wang, Yudong Lian, Shiwei Han

|November 23, 2021

Summary

This summary is machine-generated.

This study introduces a dual-frequency pulse laser to actively match frequencies in stimulated Brillouin scattering (SBS) amplification. This method enhances energy conversion efficiency for high-peak-power Stokes output.

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Area of Science:

Non-linear optics
Laser physics
Acousto-optic devices

Background:

Non-collinear stimulated Brillouin scattering (SBS) offers stable, high-peak-power Stokes output.
Frequency mismatch in SBS systems limits energy conversion efficiency.

Purpose of the Study:

To design a dual-frequency pulse laser for active frequency matching in SBS amplification.
To maintain high energy conversion efficiency during SBS processes.

Main Methods:

Utilized acousto-optic crystal modulation to generate dual-frequency laser pulses.
Employed the dual-frequency pulse pair as pump and Stokes light for SBS amplification.

Main Results:

Achieved active frequency matching between pump and Stokes light with the gain medium's Brillouin frequency shift.
Produced a dual-frequency laser with adjustable pulse width (100 ps-50 ns) and frequency shift (0 GHz-2 GHz).
Obtained a polarization extinction ratio (PER) of 20.82 dB.

Conclusions:

The developed dual-frequency pulse laser effectively addresses frequency mismatch in SBS.
This approach significantly improves energy conversion efficiency in SBS amplification systems.
The system demonstrates tunable parameters suitable for various high-peak-power applications.