Figure 2
From: Enhancement of Doppler spectroscopy to transverse direction by using optical vortex

Numerical calculation results for (a) normalized intensity distribution for optical vortex beam, (b) azimuthal Doppler shift distribution, and (c) absorption coefficient distribution. The calculations are performed with parameters \(\ell =+10\), \({U}_{x}=150\) m/s, and detuning = 360 MHz.