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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Transmission and coupling losses in a folded waveguide.

J Banerji, A R Davies, P E Jackson

|June 18, 2010

Summary

This study examines transmission and coupling losses in hollow dielectric waveguides within a folded structure. For moderate fold angles, the impact on waveguide performance is minimal.

Area of Science:

Optics and Photonics
Waveguide Technology
Electromagnetism

Background:

Hollow dielectric waveguides are crucial for transmitting electromagnetic waves.
Folded waveguide structures offer compact designs but can introduce complexities.
Understanding losses is vital for efficient optical system design.

Purpose of the Study:

To analyze transmission and coupling losses in hollow dielectric waveguides within a folded configuration.
To investigate the impact of a spherical mirror and non-zero on-axis angle on waveguide modes.
To evaluate the astigmatism introduced by the fold and its effect on performance.

Main Methods:

Theoretical analysis of hollow dielectric waveguide modes.
Modeling of a folded waveguide structure with a spherical mirror.

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Calculation of transmission and coupling losses.

Main Results:

The folded waveguide structure introduces astigmatism.
For moderate fold angles (10-20 degrees), the effect of the fold on losses is negligible.
Transmission and coupling losses are characterized for the analyzed modes.

Conclusions:

Folded hollow dielectric waveguides can be designed with minimal loss for moderate fold angles.
The astigmatism introduced by the fold does not significantly degrade performance within a specific angle range.
This research provides insights for designing compact and efficient waveguide systems.