@oc283781; @pra77062308; @sint]. One can hence deduce that the main source of this oscillatory nature is the competition between the rate at which the coherent superposition decays and the degree at which the same coherence exhibits fluctuations initially. Quite obviously, this competition can be directly associated with the mean photon number of the generated radiation. Although it is not presented in this work, the pertinent mean photon number also exhibits a similar kind of oscillatory nature. Therefore, comparison between the two reveals that the degree of entanglement and the mean photon number are larger for the same parameters. It is hence anticipated that the thermal fluctuations arising due to high intensity might be responsible for the downturn of the quantum features (increment of $V_{s}$) [@sint]. It is worth noting at this juncture that in the definition of the covariance matrix, terms related to normal ordering are included that are basically associated with the contribution of vacuum fluctuations which might have played a significant role.

It is not hard to notice from Fig. \[fig1\] that the smallest eigenvalue corresponding to the covariance matrix is smaller for smaller values of $\gamma/\Gamma$ at early stages of the lasing process. This indicates that the 