QUASI-CRITICAL COUPLING BETWEEN SPATIALLY-RESOLVED LASER EIGENSTATES - A NOVEL-APPROACH TO THE MEASUREMENT OF INTRACAVITY ABSORPTION

被引：2

作者：

JACOB, D ^{[1
]}

TRAN, NK ^{[1
]}

FLOCH, AL ^{[1
]}

BRETENAKER, F ^{[1
]}

机构：

[1] SOC APPLICAT GEN ELECT & MECAN,F-95101 ARGENTEUIL,FRANCE

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 1995年 / 12卷 / 10期

关键词：

D O I：

10.1364/JOSAB.12.001843

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A novel method of intracavity absorption measurement is demonstrated that is linear in absorber concentration. Strong competition between spatially resolved laser eigenstates is theoretically and experimentally shown to provide conveniently controlled and highly efficient optical leverage for intracavity sensing. In a first experimental realization, a He-Ne laser at 3.39 mu m demonstrates a sensitivity of 3 x 10(9) molecules of methane in vacuum in the volume of the beam in the absorption cell, which corresponds to 0.6 part per billion times meters of CH4 in 1 atm of air. Good agreement is obtained between the experimental results and the theoretical predictions from a model of the laser dynamics based on Landau potentials associated with Lamb's equations. (C) 1995 Optical Society of America

引用

页码：1843 / 1849

页数：7