Continuous-wave self-deflection effect in sodium vapor
Grover A. SwartzlanderDepartment of Electrical and Computer Engineering, The Johns Hopkins University, Baltimore, Maryland 21218 USAHuimin YinDepartment of Electrical and Computer Engineering, The Johns Hopkins University, Baltimore, Maryland 21218 USAA. E. KaplanDepartment of Electrical and Computer Engineering, The Johns Hopkins University, Baltimore, Maryland 21218 USA
1989en
ABI
Аннотация
Observations of the self-deflection effect for an asymmetrical continuous-wave laser beam in sodium vapor are described, and comparisons based on theoretical calculations are made. A self-bending angle as large as eight diffraction widths was recorded, and strong attenuation of the on-axis radiation due to self-bending was measured. At ~200°C the self-deflection angle increased linearly with beam power, and we determined that (n2)max ≃ −10−7 cm2/W for intensities below 220 W/cm2. While numerical calculations, based on an inhomogeneously broadened two-level system, predict strong saturation of the self-bending effect, we observed only moderate saturation.
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