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Conical refraction with low-coherence light sources.

V Yu Mylnikov, S N Losev, V V Dudelev

|September 13, 2019

Summary

This summary is machine-generated.

Researchers explored conical refraction using low-coherence light, observing pattern changes with varying pinhole sizes. Reduced spatial coherence caused the disappearance of a key dark ring, aligning with theoretical models.

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Area of Science:

Optics and Photonics
Wave Phenomena

Background:

Conical refraction (CR) is a unique optical phenomenon.
Understanding CR with low-coherence light is crucial for advanced optical applications.

Purpose of the Study:

To investigate conical refraction patterns using low-coherence light sources.
To analyze the effect of reduced spatial coherence on CR patterns.

Main Methods:

Utilized low-coherence light sources (LEDs, decoherentized laser).
Varied pinhole sizes (25-100 µm) and distances (50-5 cm) to control spatial coherence.
Observed and analyzed CR patterns in the Lloyd's plane.

Main Results:

Demonstrated distinct CR patterns with low-coherence light.
Observed the disappearance of the dark Poggendorff's ring as spatial coherence decreased.
Found experimental results in agreement with the paraxial dual-cone model.

Conclusions:

Low-coherence light sources can be effectively used to study conical refraction.
Spatial coherence significantly influences CR patterns, specifically the visibility of interference features.
The paraxial dual-cone model accurately predicts CR behavior under these conditions.