论文信息 - Sensitivity enhancement of laser absorption spectroscopy by magnetic rotation effect

Sensitivity enhancement of laser absorption spectroscopy by magnetic rotation effect

The use of magnetic rotation spectroscopy (Faraday effect) to reduce the effects of source noise and improve sensitivity of spectroscopy with color center lasers has been analyzed theoretically and tested experimentally on the vibrational overtone band of NO. Sensitivity improvement of a factor of 30 compared with simple Zeeman modulation has been demonstrated. As an example of this technique, the first observation of the fundamental vibrational band of the OH radical in absorption is reported.

[1] J. W. C. Johns,et al. Λ-Doubling in the v = 2 ← 0 overtone band in the infrared spectrum of NO☆ , 1979 .

[2] W. Urban,et al. “Zeeman modulation spectroscopy” with spin-flip Raman laser , 1978 .

[3] R. Beigang,et al. Design of tunable CW colour centre lasers , 1978 .

[4] A. Schawlow,et al. Saturated-interference spectroscopy. , 1978, Optics letters.

[5] J. Maillard,et al. High-resolution emission spectrum of OH in an oxyacetylene flame from 3.7 to 0.9 μm , 1976 .

[6] Theodor W. Hänsch,et al. Doppler-Free Laser Polarization Spectroscopy , 1976 .

[7] P. Stokseth,et al. Tunable Lasers and Applications , 1976 .

[8] Kenneth M. Evenson,et al. Laser magnetic resonance study of the gas phase reactions of OH with CO, NO, and NO2 , 1974 .

[9] K. Shimoda. Limits of sensitivity of laser spectrometers , 1973 .

[10] D. Keck,et al. Magnetic‐Rotation Spectra of the 1–0 Vibration–Rotation Band of Nitric Oxide , 1968 .

[11] J. Aubel,et al. Magnetic-Rotation Spectra of the 2-0 Vibration—Rotation Band of NO , 1966 .

[12] Burton D. Fried,et al. The Plasma Dispersion Function , 1961 .

[13] G. R. Gunther-Mohr,et al. HYPERFINE STRUCTURE IN THE SPECTRUM OF N¹⁴H. I. EXPERIMENTAL RESULTS , 1954 .