You get a bonus - 1 coin for daily activity. Now you have 1 coin

Resonance phase condition

Lecture



It is easy to see that the resonance phase condition also holds for a constant wavelength, but a variable angle of incidence.

  Resonance phase condition ,

  Resonance phase condition .

Let us determine the dependence of the resonator field functionally on the angle   Resonance phase condition (propagation inside the resonator).

  Resonance phase condition

  Resonance phase condition

  Resonance phase condition

  Resonance phase condition

  Resonance phase condition

  Resonance phase condition .

  Resonance phase condition ,

  Resonance phase condition ,

  Resonance phase condition . (*)

In the formula (*) we consider   Resonance phase condition - dependence only on the angle of wave propagation. Waves traveling at different angles to the cavity axis form transverse modes, i.e., the stationary field distribution in the transverse direction. Since the field has an uneven distribution, in the far field it is a radiation pattern.

  Resonance phase condition ,

where R is the far zone, and is the size of the mirror.

  Resonance phase condition ,

  Resonance phase condition

  Resonance phase condition   Resonance phase condition .

  Resonance phase condition ,

  Resonance phase condition ,

  Resonance phase condition .

  Resonance phase condition

  Resonance phase condition ,

  Resonance phase condition ,

  Resonance phase condition .

From the comparison of the frequency response and the angular characteristics, it follows that the more acute the characteristic, the more selective it is in frequency.

Frequency response and amplitude-angle characteristic

filled active body.

  Resonance phase condition

  Resonance phase condition ,

  Resonance phase condition ,

  Resonance phase condition   Resonance phase condition .

  Resonance phase condition

The presence of losses in the AE leads to a decrease in the quality factor. The presence of additional density leads to an increase in electrical length.

The non-uniformity of the refractive index in the cross section leads to deformation of the mode, therefore, the angular divergence increases.

  Resonance phase condition ,

M = 1 + n + m,

1,22 - modal multiplier for a round laser.

Heating AE leads to its geometric distortion and additional losses.


Comments


To leave a comment
If you have any suggestion, idea, thanks or comment, feel free to write. We really value feedback and are glad to hear your opinion.
To reply

Quantum electronics

Terms: Quantum electronics