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Related Experiment Video

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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

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Published on: July 12, 2017

Type I and type II second harmonic generation of conically refracted beams.

Alex Turpin¹, Yurii V Loiko, Todor K Kalkandjiev

¹Departament de Física, Universitat Autònoma de Barcelona, Bellaterra, Spain. alejandro.turpin@uab.cat

|August 14, 2013

Summary

This study presents second harmonic generation (SHG) patterns resulting from conical refraction. Type I SHG shows a light ring with a null point, while Type II exhibits two dark regions in the ring.

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Area of Science:

Nonlinear Optics
Quantum Optics
Laser Physics

Background:

Second harmonic generation (SHG) is a fundamental nonlinear optical process.
Conical refraction is a unique phenomenon occurring in biaxial crystals.
Understanding light-matter interactions in nonlinear media is crucial for optical technologies.

Purpose of the Study:

To investigate Type I and Type II second harmonic generation (SHG) in the context of conical refraction.
To analyze the transverse intensity patterns and spatial evolution of SHG signals.
To provide theoretical descriptions that match experimental observations.

Main Methods:

Experimental generation and observation of SHG from a beam undergoing conical refraction.
Derivation of analytical expressions for transverse intensity patterns based on two-photon processes.
Comparison of theoretical predictions with experimental data.

Main Results:

Type I SHG produced a light ring with a single dark point.
Type II SHG resulted in a light ring with two dark regions.
The spatial evolution of SHG signals mirrored that of conically refracted beams.

Conclusions:

The study successfully characterized the distinct SHG patterns for Type I and Type II processes under conical refraction.
Analytical models accurately predict the observed transverse intensity distributions.
SHG signals generated through conical refraction exhibit predictable spatial propagation behavior.