Polarization effects in linear lasers with arbitrary polarization of counterpropagating travelling waves of laser modes

Polarization dynamics in a microlaser with a saturable absorber

“…(5) Values ak (k = x, y) are nonsaturated inversions of populations, which can be different due to anisotropic pumping, n (1 = 1, 2) are nonsaturated components of absorption and they, as values ak and bl are normalized to the loss of a laser. Decay rate of populations in an absorber db is written in units of the decay rate of the inversion of populations in active medium Da .…”

“…Decay rate of populations in an absorber db is written in units of the decay rate of the inversion of populations in active medium Da . Time t is normalized to the time of decay of populations in an active medium and points over the variables in left parts of equations (1)- (5) give us derivatives on this sizeless time. Amplitudes of field are normalized to the amplitude of field of saturation of x-component in active medium and parameters of saturation Sak, Sbl are normalized so that Sax = 1.…”

“…Polarisation of light appears an additional degree of freedom and enriches laser nonlinear dynamics [1,5,6]. Experiments give us passive quality switching (PQS) regimes in crystal laser with an anisotropic saturable absorber (LASA) on the basis of YAG:Cr4 or LiF:F [7][8][9].…”