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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Published on: May 30, 2014

Tunable 2-μm optical vortex parametric oscillator.

Taximaiti Yusufu¹, Yu Tokizane, Masaki Yamada

¹Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan.

|November 29, 2012

Summary

This summary is machine-generated.

Researchers created tunable 2-μm optical vortex pulses using a novel parametric oscillator. This method efficiently transfers topological charge, enabling versatile applications in laser technology.

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Area of Science:

Optics and Photonics
Laser Physics

Background:

Optical vortex pulses possess unique properties like orbital angular momentum.
Parametric oscillators are versatile light sources for generating various wavelengths.

Purpose of the Study:

To generate tunable 2-μm optical vortex pulses.
To investigate the anisotropic transfer of topological charge in a vortex-pumped optical parametric oscillator.

Main Methods:

Utilized a half-symmetric optical parametric oscillator pumped by a vortex beam.
Employed a shearing interferometric technique with a low-spatial-frequency transmission grating to analyze topological charge.

Main Results:

Achieved tunable 2-μm optical vortex pulses with topological charges of 1 or 2.
Generated vortex output with a maximum energy of 2.1 mJ at a pump energy of 22.8 mJ.
Observed a slope efficiency of 15% for the vortex output.

Conclusions:

Demonstrated efficient anisotropic transfer of topological charge from pump to signal.
Successfully generated and characterized tunable optical vortex pulses in the 2-μm range.
The vortex-pumped optical parametric oscillator is a viable source for high-energy optical vortex generation.