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Optical Engineering

Diagnostic principles of four-wave mixing for plasmas
Author(s): Yuedong Meng; Jiangang Li; Jiarong Luo
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Paper 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.

Paper Details

Date Published: 1 November 1994
PDF: 5 pages
Opt. Eng. 33(11) doi: 10.1117/12.183386
Published in: Optical Engineering Volume 33, Issue 11
Show Author Affiliations
Yuedong Meng, Academia Sinica (China)
Jiangang Li, Academia Sinica (China)
Jiarong Luo, Academia Sinica (China)

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