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Grating axicon for collimating Cerenkov radiation waves.

G Hatakoshi, M Kawachi, K Terashima

|September 23, 2009

Summary

This summary is machine-generated.

A novel grating axicon was developed to collimate Cerenkov radiation waves, simplifying fabrication and correcting aberrations in optical waveguides. This innovation enhances the performance of Cerenkov-type second-harmonic generation.

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Area of Science:

Optics and Photonics
Materials Science
Nonlinear Optics

Background:

Cerenkov radiation is a key phenomenon in nonlinear optical processes.
Collimating Cerenkov radiation is crucial for efficient harmonic generation.
Substrate anisotropy in materials like LiNbO(3) can cause aberrations.

Purpose of the Study:

To fabricate and characterize a grating axicon for collimating Cerenkov radiation.
To investigate the aberration correction capabilities of the grating axicon.
To demonstrate its application in Cerenkov-type second-harmonic generation.

Main Methods:

Fabrication of a grating axicon using computerized numerical control (CNC) machining.
Experimental confirmation of collimation for Cerenkov radiation.
Analysis of aberrations caused by substrate anisotropy in LiNbO(3) waveguides.
Investigation of aberration compensation by adjusting substrate or axicon inclination.

Main Results:

Successful fabrication of a simple-structured grating axicon.
Demonstrated collimation of Cerenkov radiation waves.
Confirmed aberration correction by inclining the substrate facet or grating axicon.
Verified functionality in Cerenkov-type second-harmonic generation.

Conclusions:

The grating axicon is an effective and easily fabricated element for collimating Cerenkov radiation.
Aberrations due to substrate anisotropy can be compensated, improving optical performance.
This technology holds promise for advanced nonlinear optical applications.