Non-diffractive model of capturing a mode of ring laser with holographic mirror by a signal speckle-wave

摘要

Possibility of high fidelity reconstruction of complicated amplitude-phase information on spatial structure of signal radiation in the mode of a ring resonator with a holographic mirror has been studied in the parametric space singularity satisfying the geometric-optical approximation. Demonstration of this possibility, when diffraction is suppressed both in the hologram and in the feedback loop of the 'holographic' resonator, proves the existence of more universal mechanisms in the scheme than the diffractive one, which are responsible for capturing the spatial structure of the resonator mode by the signal speckle-wave. The reasons for some disagreement between the model conclusions and experimental data obtained in a YAG:Nd-laser with hologram of gain saturation have been discussed.