Beam propagation method analysis of optical waveguide lenses

Area of Science:

• Optics and Photonics
• Waveguide Technology

Background:

• Optical waveguide lenses are crucial for light manipulation.
• Traditional ray tracing methods have limitations in analyzing complex optical phenomena.

Purpose of the Study:

• To analyze the focusing characteristics of optical waveguide lenses.
• To demonstrate the effectiveness of the beam propagation method (BPM) for this analysis.

Main Methods:

• Utilized the beam propagation method (BPM) for optical analysis.
• Applied BPM to mode-index, Luneburg, and geodesic lenses.
• Converted surface deformation to an equivalent index for geodesic lens analysis.

Main Results:

• BPM enables observation of field distributions for converging/diverging light beams.
• Spot width variations and diffraction magnitudes are readily evaluated.
• The method is applicable to various waveguide lens types.

Conclusions:

• The beam propagation method (BPM) provides a powerful tool for analyzing optical waveguide lens performance.
• BPM offers advantages over ray tracing for detailed field and diffraction analysis.
• This method facilitates the design and optimization of waveguide optical systems.