We performed an experimental and theoretical study on saturation absorption spectroscopy on Rb-87 and Rb-85 atoms in D-2 transition using a Laguerre-Gaussian (LG) beam with higher orders. We observed narrow line shapes of the Doppler and hyperfine absorption profiles due to the introduction of the LG beam in comparison to the fundamental Gaussian beam. Narrowing of the line shape is dependent on the azimuthal mode index of the LG field. It is observed that the spatially dependent Rabi frequency plays a significant role behind these narrowing phenomenon. (C) 2015 Elsevier B.V. All rights reserved.