We show experimentally that clean fundamental and Stokes RF spectra are observed in the output from a passively switched fiber laser configuration that was first demonstrated by Zhao and Jackson [Opt. Lett. 31, 751 (2006)]. Stable pulse trains are shown to be produced, thus verifying that the passively switched fiber laser operates in a stable fashion. Describing the physical mechanisms underlying the behavior as nonstationary within the cavity may only partly describe the observed behavior.