Temporal characteristics of solid-state lasers in free-running mode

Consider 3 levels:

Picture 1.

,

,

and durations have the following limits:

, .

where .

The field intensity in the free generation mode is:

Figure 2.

The figure shows the multitouch operation.

The reasons for the multi-peg nature in the free generation mode are:

• the interaction of neighboring stoves;
• non-uniform relaxation;
• quantization.

If you reduce the quality factor, the stoves will change and decrease:

Figure 3.

.

To obtain a single-pulse operation mode, which is necessary both in measurements and in engineering, 2 methods are used:

1 - Q modulation method;

2 - method of synchronization of longitudinal modes.

Q-factor modulation method.

The modulator is as follows:

Figure 4.

Figure 5.

1 - without shutdown,

2 - with shutdown.

The good quality modulation in the old technique was carried out mechanically.

The pulse duration in the Q-switching mode is as follows:

where .

In Q-switched mode, the pumping is as follows:

Figure 6.

Figure 7.