Generation of squeezed (sub-Poissonian) light by a multimode laser

Quantum equations of motion for multimode laser generation with a spatial dependence of the atom interaction with the field taken into account

“…(3)-(5) are not correlated with each other if pertaining to different atoms and that the random operators for different field modes, similarly, are also not correlated with each other. As a result of cumbersome calculations, similar to those performed in [14]- [16], we obtain the expressions for operators of the random sources in Eqs. (28):…”

“…The approximation of identical modes, broadly used in the theory of multimode laser generation [12]- [16], in some cases allows assessing the generation dynamics qualitatively, but in the general case and for a * Lebedev Physical Institute, RAS, Moscow, Russia, e-mail: kozlovsk@sci.lebedev.ru. certain range of the laser parameter values, such an analysis requires more precise calculations that would account for both the difference between coupling constant values and the difference in the rates of losses of the laser EM field due to the leak through the cavity mirrors for different field modes involved in the generation.…”

“…A full quantum mechanical theory of multimode generation was considered in [1], [11]- [16]. The approximation of identical modes was used in [12]- [16]. We note that in [1]- [4] in the semiclassical theory, the phenomenon of spatial burning of a hole in the population inversion of an active medium was regarded as the main reason and the necessary condition for the occurrence of stable multimode laser generation with a homogeneously broadened line.…”

“…The semiclassical theory of multimode (multifrequency) laser generation was developed in [1]- [10], where the Maxwell equations for a classical EM field were considered and the active medium was described quantum-mechanically in terms of a density matrix (operator) and an ensemble of two-level atoms. A full quantum mechanical theory of multimode generation was considered in [1], [11]- [16]. The approximation of identical modes was used in [12]- [16].…”

Mechanism for quantum noise suppression in a multimode laser

“…A quantum-statistical theory of a multimode laser, which studies the fluctuation properties of the laser radiation, has been actively developed since the early 1960s up to the present time [1][2][3][4][5][6][7][8][9].…”