High power nd:glass laser for fusion applications

Area of Science:

• Physics
• Engineering
• Materials Science

Background:

• Laser-induced thermonuclear fusion demands high-brightness, high-energy, short-pulse lasers.
• Neodymium-doped glass (Nd:glass) is identified as a suitable laser medium for these requirements.

Purpose of the Study:

• To address the challenges in designing high-power Nd:glass laser systems.
• To present the design and operational details of a multi-beam Nd:glass laser facility.

Main Methods:

• Detailed design considerations for high-power Nd:glass laser systems.
• Development and implementation of advanced beam diagnostic techniques.
• Construction and operation of a two-beam and subsequently a four-beam laser system.

Main Results:

• An operational two-beam Nd:glass system achieved subnanosecond pulses with 350 J per beam.
• A four-beam system was successfully commissioned, delivering over a kilojoule in subnanosecond pulses.

Conclusions:

• Nd:glass laser technology is viable for achieving the high energy and short pulse durations required for thermonuclear fusion research.
• The developed system design and diagnostic techniques provide a foundation for future high-power laser facilities.