Diagnostic principles of four-wave mixing for plasmas

Yuedong Meng; Jiangang Li; Jiarong Luo

doi:10.1117/12.183386

1 November 1994 Diagnostic principles of four-wave mixing for plasmas

Yuedong Meng, Jiangang Li, Jiarong Luo

Author Affiliations +

Optical Engineering, Vol. 33, Issue 11, (November 1994). https://doi.org/10.1117/12.183386

Abstract

A new method is used to diagnose plasma density space-profiles that involves phase conjugate reflection of four-wave mixing. Theoretical calculations for plasma parameters in the HT-6M tokamak show that two pump-wave beams (HCN laser), with a power of 1 W together with a signal beam (D₂O or CH₃F laser) of 0.1 W, can create a reflection of 0.1 to 0.43 mW with a phase conjugate to the signal where the cross section of all external beams is 1 cm². This means that the reflective ratio of four-wave mixing is two orders larger than the ratio of laser superheating scatter. The lower power laser, therefore, can be used to diagnose plasmas.

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Yuedong Meng, Jiangang Li, and Jiarong Luo "Diagnostic principles of four-wave mixing for plasmas," Optical Engineering 33(11), (1 November 1994). https://doi.org/10.1117/12.183386

Published: 1 November 1994

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