Confocal unstable optical resonator with asymmetrical magnification

Area of Science:

• Optics and Photonics
• Laser Physics

Background:

• Unstable laser cavities are crucial for high-power lasers.
• Traditional designs can suffer from aberrations or be costly.

Purpose of the Study:

• To present a low-cost, aberration-free unstable laser cavity design.
• To achieve asymmetrical magnification and collimated output.

Main Methods:

• Utilizing a combination of spherical and cylindrical mirrors.
• Introducing two additional cylindrical mirrors to the cavity.
• Analyzing the system in the geometrical-optics limit.

Main Results:

• Successfully arranged an unstable laser cavity with asymmetrical magnification.
• Generated collimated output.
• Avoided aberration problems associated with tilted mirror systems.
• Demonstrated a cost-effective alternative to diamond-turned mirrors.

Conclusions:

• The proposed mirror combination offers an efficient and affordable method for constructing unstable laser cavities.
• This design overcomes key limitations of existing systems, enabling high-quality laser output.