2-TONE FREQUENCY-MODULATION SPECTROSCOPY WITH A CO2-LASER

被引：7
作者：
COOPER, DE
CARLISLE, CB
机构：
[1] SRI International, Menlo Park, CA, 94025
来源：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 1990年 / 7卷 / 02期
关键词：
D O I：
10.1364/JOSAB.7.000164
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report the laboratory demonstration of two-tone frequency-modulation spectroscopy with a continuous-wave (cw) CO2laser. Using a resonant-cavity electro-optic phase modulator operating at 1 GHz, we obtained sensitivities to absorptions of 2 × 10-5in a 1-Hz bandwidth from an 6talon resonance and from calibrated mixtures of NH3. This sensitivity was within a factor of 3 of the quantum noise limit for our apparatus and was limited by baseline drift and fluctuations due to residual amplitude modulation and optical fringes. © 1990 Optical Society of America.
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页码：164 / 171
页数：8
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