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

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Published on: July 12, 2017

Self-similar pulses in coherent linear amplifiers.

Soodeh Haghgoo¹, Sergey A Ponomarenko

¹Department of Electrical and Computer Engineering, Dalhousie University, Halifax, NS, B3J 2X4, Canada.

|June 7, 2011

Summary

We discovered self-similar optical pulses in amplifiers. These pulses universally describe the diffusive broadening of short laser pulses near optical resonance, following a simple diffusion law.

Area of Science:

Nonlinear optics
Quantum optics
Laser physics

Background:

Understanding pulse propagation in amplifying media is crucial for laser technology.
Coherent amplification and optical resonance phenomena are key areas in photonics.

Purpose of the Study:

To discover and analytically describe self-similar pulses in linear amplifying media.
To demonstrate their role as universal asymptotics for near-resonant short pulses.
To investigate the nature of pulse broadening and compare energy gain factors.

Main Methods:

Analytical description of self-similar pulses.
Numerical simulations of pulse propagation in coherent linear amplifiers.
Comparison of energy gain for different pulse types.

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Main Results:

Discovery and analytical characterization of self-similar pulses.
Demonstration of universal self-similar asymptotics for near-resonant short pulses.
Identification of diffusive pulse broadening governed by the simple diffusion law.

Conclusions:

Self-similar pulses are fundamental to understanding pulse dynamics in resonant amplifying media.
The diffusive nature of pulse broadening offers a simplified model for pulse evolution.
Insights into energy gain factors provide practical considerations for amplifier design.