Beam deflection in a pulsed chemical laser amplifier

Area of Science:

• Physics
• Optics
• Laser Science

Background:

• Gaussian beams are fundamental in laser applications.
• Transverse gain gradients in amplifying media can affect beam propagation.
• Understanding beam steering is crucial for high-power laser systems.

Purpose of the Study:

• To analyze and experimentally investigate the deflection of a Gaussian beam.
• To study the impact of a strong transverse gain gradient on beam propagation.
• To examine the roles of dispersion and gain steering in beam deflection.

Main Methods:

• Theoretical analysis incorporating dispersion and gain steering effects.
• Experimental setup using a high-power pulsed chemical laser amplifier.
• Utilizing a continuous-wave (CW) frequency-stabilized laser as the source.

Main Results:

• Observed time-dependent beam deflection.
• Demonstrated deflection caused by the interaction of gain gradient and beam curvature.
• Validated analytical predictions with experimental data.

Conclusions:

• Transverse gain gradients significantly influence Gaussian beam propagation in amplifiers.
• Gain steering and dispersion are key factors in beam deflection.
• Experimental observation confirms theoretical predictions of time-dependent deflection.