Optical open resonators

Electrodynamic numbering system , , performs the same role as an ordinary autogenerator. It provides a frequency selection of cokes, transverse waves, i.e. selection at the laser output, forms the required radiation pattern.

The design of open resonators.

N is the number of reflections in the cavity.

, ,

,

All waves are reaching go beyond the resonator and take out the energy and diffraction losses are obtained.

(one)

Losses in material:

- dissipation loss;

- absorption loss.

Losses in the mirror:

Total losses:

Confocal resonator:

Semi-focal resonator:

Concentric resonator:

Semi-concentric resonator:

The amplitude of the field in an open resonator.

; ; ;

- the number of addition of waves in the resonator in the cross section of which the amplitude of the field decreases by e times, and the power by e ² times.

; ; ;

Due to the accumulation of the field, a loss is compensated for in one pass.