Polarisation capture of the wave front of depolarised speckle radiation by a holographic laser mode

The polarisation properties of a reference-free hologram inside which the diffraction of the recording depolarised radiation from the speckle inhomogeneities is insignificant, are studied. It is shown that such a hologram, used as the output mirror of a ring laser, has selective properties for the specklon waves comprising the lasing mode. The behaviour of the fundamental mode of a holographic laser with an inhomogeneous birefringent medium inside the cavity is analysed. Conditions for attaining amplitude-phase relations between mode specklons, which are required for vector phase conjugation of depolarised speckle signal, are determined.