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Schemes and methods for creating inversion. Kinetic equations

Lecture



To obtain induced radiation, various forms of energy conversion into energy of induced radiation are used. It is necessary that t> t N.

If it turns out that m H > m, then there will be a stationary mode, that is, a pulsed excitation.   Kinetic equations allow us to investigate the dependence of the population in time and on the pump equation. And this ultimately allows to determine the required threshold level of pumping.

  Schemes and methods for creating inversion.  Kinetic equations

  Schemes and methods for creating inversion.  Kinetic equations

  Schemes and methods for creating inversion.  Kinetic equations

  Schemes and methods for creating inversion.  Kinetic equations

  Schemes and methods for creating inversion.  Kinetic equations

  Schemes and methods for creating inversion.  Kinetic equations   Schemes and methods for creating inversion.  Kinetic equations

  Schemes and methods for creating inversion.  Kinetic equations

  Schemes and methods for creating inversion.  Kinetic equations

  Schemes and methods for creating inversion.  Kinetic equations   Schemes and methods for creating inversion.  Kinetic equations

Kinetic equations for a three-level system.

Such a system is characteristic for the excitation of ruby. v OH for ruby ​​in the green area.

  Schemes and methods for creating inversion.  Kinetic equations

  Schemes and methods for creating inversion.  Kinetic equations   Schemes and methods for creating inversion.  Kinetic equations

  Schemes and methods for creating inversion.  Kinetic equations

  Schemes and methods for creating inversion.  Kinetic equations

With   Schemes and methods for creating inversion.  Kinetic equations ,   Schemes and methods for creating inversion.  Kinetic equations

  Schemes and methods for creating inversion.  Kinetic equations

In the presence of a weak field, a three-level system has positive energy, that is, it can be excited if, in the limit, half of the active particles can be excited.

A four-level system is easily excited.


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Quantum electronics

Terms: Quantum electronics