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Angular dependence of phase conjugation in SF(6).

C L Cesar, J W Tabosa, P C Oliveira

|September 12, 2009

Summary

Researchers studied optical phase conjugation using degenerate four-wave mixing in SF(6) with a CO(2) laser. Experimental results confirmed theoretical predictions for the resonant two-level gas model.

Area of Science:

Nonlinear Optics
Quantum Optics
Laser Physics

Background:

Optical phase conjugation (OPC) is crucial for correcting optical aberrations.
Degenerative four-wave mixing (DFWM) is a key technique for achieving OPC.
Sulfur hexafluoride (SF(6)) gas exhibits unique nonlinear optical properties.

Purpose of the Study:

To investigate OPC via DFWM in SF(6) using a continuous wave (cw) CO(2) laser.
To experimentally measure the reflectivity's dependence on intensity and angle.
To validate theoretical models of nonlinear optical interactions in gases.

Main Methods:

Utilized a cw CO(2) laser operating at the 10.6-micrometer P(18) line.
Employed degenerate four-wave mixing in SF(6) gas.

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Measured optical reflectivity as a function of laser intensity and beam geometry.

Main Results:

Observed optical phase conjugation in SF(6) via DFWM.
Quantified the intensity and angular dependence of the measured reflectivity.
The experimental data closely matched theoretical predictions.

Conclusions:

The study successfully demonstrated OPC in SF(6) using DFWM.
Experimental findings support the applicability of the inhomogeneously broadened resonant two-level gas model.
This work validates theoretical frameworks for nonlinear light-matter interactions in gases.