CO2 laser stabilized on narrow saturated absorption resonances of CO2;: improved absolute frequency measurements

被引：15

作者：

Bernard, V ^{[1
]}

Nogues, G ^{[1
]}

Daussy, C ^{[1
]}

Constantin, L ^{[1
]}

Chardonnet, C ^{[1
]}

机构：

[1] Univ Paris 13, Phys Lasers Lab, F-93430 Villetaneuse, France

来源：

METROLOGIA | 1997年 / 34卷 / 04期

关键词：

D O I：

10.1088/0026-1394/34/4/4

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We have stabilized a CO2 laser on narrow saturated absorption resonances of CO2 detected on the transmitted beam of an external Fabry-Perot cavity in the 30 THz spectral region. By using another CO2 laser stabilized on a close OsO4 line whose absolute frequency is precisely known, and measuring the beat frequency with a precision of 100 Hz, we determined the absolute frequency of twenty CO2 laser lines, with uncertainties between 100 Hz and 1 kHz mainly limited by the accuracy of the OsO4 grid. This set of measurements reveals some discrepancies with data based on measurements performed with the widely used saturated fluorescence technique; we attribute these to pressure shifts of several kilohertz under the conditions of this last method.

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页码：313 / 318

页数：6

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