A HIGHLY SENSITIVE TECHNIQUE OF DETECTING SUPERNARROW SPECTRAL LINES BASED ON THE FREQUENCY RESONANCES OF A DOUBLE-MODE LASER

N. Basov , M. Gubin , V. Nikitin , A. Nikulchin , D. Tyurikov , V. Petrovskiy , E. Protscenko

The present work investigates a highly sensitive technique of obtaining narrow resonances of saturated dispersion detected by the mode beat signal of a double-mode laser with an internal absorption cell which allows to register weak absorption lines with the ~ 10-11 cm-1 Hz-1/2 sensitivity determined by the natural frequency fluctuations of the laser. The resonances of 2.2 kHz HWHM have been separated in the 80 cm cell with the light beam of the 30 mm in diameter in experiments on the He-Ne/CH4 double-mode laser (λ = 3.39 mkm).

Domains: Physics archives

N. Basov, M. Gubin, V. Nikitin, A. Nikulchin, D. Tyurikov, et al.. A HIGHLY SENSITIVE TECHNIQUE OF DETECTING SUPERNARROW SPECTRAL LINES BASED ON THE FREQUENCY RESONANCES OF A DOUBLE-MODE LASER. Journal de Physique Colloques, 1981, 42 (C8), pp.C8-89-C8-95. ⟨10.1051/jphyscol:1981811⟩. ⟨jpa-00221706⟩