Beam pointing direction changes in a misaligned Porro prism resonator

Area of Science:

• Optics and Photonics
• Laser Physics
• Optical Engineering

Background:

• Porro prism resonators are fundamental optical components.
• Understanding beam stability is crucial for laser applications.
• Misalignment can degrade resonator performance.

Purpose of the Study:

• To analyze the relative change in beam pointing direction for a misaligned Porro prism resonator.
• To introduce and utilize the concept of an oscillation axis for beam direction analysis.
• To derive expressions for beam tilting angles.

Main Methods:

• Theoretical analysis of beam propagation in a misaligned Porro prism resonator.
• Introduction of the oscillation axis concept.
• Deduction of mathematical expressions for beam tilting angles.

Main Results:

• Angular misalignment in the horizontal direction was found to induce beam tilting in both horizontal and vertical planes.
• Theoretical predictions for beam tilting angles were derived.
• Experimental validation confirmed the theoretical predictions.

Conclusions:

• The study provides a theoretical framework for understanding beam pointing stability in Porro prism resonators.
• The oscillation axis concept offers a novel approach to analyzing beam direction.
• Experimental results validate the theoretical model, crucial for optical system design.