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Acta Chimica Sinica ›› 1999, Vol. 57 ›› Issue (4): 396-401. Previous Articles Next Articles
Original Articles
杨新菊;王苗苗;陈德应;郑企克
发布日期:
Yang Xinju;Wang Miaomiao;Chen Deying;Zheng Qike
Published:
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The effects of laser fluence and foreign gas (N~2, CO~2, NO~2) pressure on the degenerate four-wave-mixing (DFWM) spectrum and signal intensity of I~2 have been studied. The dependence of DFWM saturation intensity on foreign gas pressure is measured and found to be I~s~a~t∝p^0^.^7. Results show that the foreign gas has little effect on the DFWM spectrum structure but has great effect on the signal intensity, which depends on the laser fluence. At high laser fluence, the addition of foreign gas can enhance the DFWM signal, and thermal grating contribution dominates. Using the relationship of I~s~a~t∝p^0^.^7 and the two-level model, the dependence of I~2 DFWM intensity on foreign gas pressure can be well fitted.
Key words: IODINE
CLC Number:
O644
Yang Xinju;Wang Miaomiao;Chen Deying;Zheng Qike. Effects of foreign gases on the degenerate four-wave-mixing in I~2[J]. Acta Chimica Sinica, 1999, 57(4): 396-401.
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