Xf. Yue et al., THEORETICAL INVESTIGATION OF PHOTOREFRACTIVE RING PASSIVE PHASE-CONJUGATE MIRROR IN THE PRESENCE OF ASYMMETRIC TRANSMISSION, J. mod. opt., 41(3), 1994, pp. 603-608
The performance of a photorefractive ring phase-conjugate mirror is fo
und to be determined by the combined effect of coupling the strength (
GAMMAL), the product (T1T2) and the ratio (T1/T2) of the cavity transm
issivities along the two directions. The threshold phase-conjugate ref
lectivity of the device can be changed or controlled by the variation
of these three parameters.