Abstract
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 μm demonstrates a sensitivity of 3 × 109 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.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
