Nonlinear dynamics of the microwave stimulated emission in dissipative paramagnetic systems

Makovetskii, D. N.

doi:10.1109/msmw.2001.947302

Cited by 1 publication

(1 citation statement)

References 3 publications

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“…The obtained results correlate somewhat with conclusions of paper [29] in which from the quite different point of view the questions about the possibility of strong, irreversible, and mutual influence of the registered objects and measuring system are touched upon. Finally, it should be noted that the approach developed in this paper, can be summarized even for the more complicated case of two-resonator systems [25,[30][31][32], with the purpose of the further study of mechanisms of non-stationary and induced phonons in autonomous and non-autonomous phasers as well as in other class "B" multilevel active systems in which the longitudinal relaxation time of the active (excited) medium exceeds significantly the life times of electromagnetic and acoustical excitations.…”

Section: K K ≈mentioning

confidence: 99%

Saturation of Stationary Inversion States in a Three-Level Traveling-Wave Quantum Amplifier with Bistable Resonator Pumping

Makovetskii

2003

Telecom Rad Eng

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The inversion states of a saturated three-level traveling-wave quantum paramagnetic amplifier have been investigated under conditions of bistable resonator pumping. The equations of motion for the vectorial order parameter have been obtained using adiabatic elimination of fast variables. These equations are a generalization of the scalar two-level Drummond model for the case of a three-level quantum active system. Isolated branches of the constant of inversion have been found from stationary solutions of equations for the vectorial order parameter. A analysis of bifurcations in the saturated quantum amplifier with bistable pumping has been represented with full details.The saturation of transitions between quantum levels of active centers is of paramount importance at the excitation of states with inverse population difference of energy levels. This mechanism is the basis for operation of many devices of quantum electronics [1,2] and other equipments of this type (for example, acoustical quantum amplifiers and phasers generators [3,4], radio-frequency masers based on nuclear magnetic resonance [5] and other active systems [6]).The investigation of nonlinear processes in optical quantum systems led to the experimental disclosure of effects of bistability and multistability [7] in the middle 70s. In the case of bistability there are two different stable states of a nonlinear optical resonator at the same set of control parameters. At the multistability there are more than two such stable states. The initial interest in optical bistable systems has been roused by the assumed possibility of their workability as a component basis for computers of a new generation [8], since the switching time between states of a bistable cell of the nonlinear optical resonator can be small (less than 10 -9 s).The microwave analogue of the optical bistability has been also observed in a number of cases in paramagnetic [9] and gas [7,10] operating media in the frequency range from 10 to 85 GHz, however the typical switching times for microwave bistable systems turn out to be much more orders greater than for optical ones. Therefore, to develop computer logic elements, the microwave bistable cells can not be used. Nevertheless the investigation of bistability in microwave systems is not only of scientific interest but sharply defined practical interest although from the absolutely different point of view.The fact is that the ramification of states of a nonlinear system (the bistability and multistability of this phenomenon are particular cases) is the rule rather than the exception, if the corresponding nonlinear parameter C exceeds the specific threshold. For the optical bistable system this threshold is well known = opt C 4, where opt C is the parameter of cooperativity [7,11] being proportional to the resonator figure of merit. The similar threshold exists as well as for the microwave nonlinear resonator that was shown, *

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Section: K K ≈mentioning

confidence: 99%

Saturation of Stationary Inversion States in a Three-Level Traveling-Wave Quantum Amplifier with Bistable Resonator Pumping

Makovetskii

2003

Telecom Rad Eng

View full text Add to dashboard Cite

show abstract

Nonlinear dynamics of the microwave stimulated emission in dissipative paramagnetic systems

Cited by 1 publication

References 3 publications

Saturation of Stationary Inversion States in a Three-Level Traveling-Wave Quantum Amplifier with Bistable Resonator Pumping

Saturation of Stationary Inversion States in a Three-Level Traveling-Wave Quantum Amplifier with Bistable Resonator Pumping

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