Quasiperiodic Behavior in the γ-Ray Light Curve of the Blazar PKS 0405-385

We analyze the quasi-periodic oscillation (QPO) of historical light curve FSRQs PKS 0405-385 detected by Fermi LAT from August 2008 to November 2021. To identify and determine QPO signal in $\gamma$-ray curve, we use four time series analysis techniques based on frequency domains, i.e., Lomb-Scargle periodogram (LSP), weighted wavelet z-transform (WWZ), REDFIT epoch folding. The results show that has a behavior $\sim$2.8 yr with significance $\sim$4.3$\sigma$ long-term monitoring. Remarkably, also performed G-band observed October 2014 2021 using LSP WWZ technology, ($\sim$4$\sigma$ significance) are consistent periodic detection $\gamma$-ray. This may imply optical emission is radiated an electron population same as \gr\ emission. In discussing possible mechanism behavior, either helical motion within jet or supermassive black hole binary system provides viable explanation for 2.8 yr, relevant parameters have been estimated.