It refers to a light pulse emitted by a pulsed laser. Simply put, just like the work of a flashlight, it is continuous work to keep the button closed, and it is a "light pulse" to turn off the switch immediately.

the pulse has the characteristic of interval, so it can be used as a signal. The definition of pulse signal comes from this:

Compared with continuous signals (signals that exist for a short time in the whole signal period), there is no signal in most pulse signal periods. Just like a person's pulse.

a pulse signal generally refers to a digital signal, which has been signaled half the time (or even longer) in a cycle. The signal in the computer is a pulse signal, also called a digital signal.

In addition, pulses are also used to express emotional impulses and demands. For example, only competition can make the society develop more perfectly and harmoniously, but there is no such signal and pulse among many middle school students. (China Youth Daily, April 19, 1988)? [1]?

it is necessary to work in pulse mode, such as sending signals and reducing heat generation. Laser pulses can be extremely short, such as "picosecond" level, that is to say, the pulse time is of the order of picosecond-and 1 picosecond is equal to one trillionth of a second.

Extended information:

Generally, the output power is relatively low, which is suitable for occasions requiring continuous laser operation (such as laser communication and laser surgery).

pulsed laser:

pulsed working mode refers to the mode of working once every certain time interval.

pulse laser has a large output power, which is suitable for laser marking, cutting and ranging.

Common pulse lasers: YAG laser, ruby laser, sapphire laser, Nd: glass laser, etc. There are also nitrogen molecular lasers and excimer lasers.

Giant pulse laser:

The loss is artificially added in the cavity to make it greater than the gain of the working substance, and there is no laser output at this time. However, under the continuous excitation of the pump source, the number of atoms in the upper level of the laser is increasing.

a large inversion of particle number is obtained. If the peak power is defined as the energy of the pulse divided by the duration (pulse width) of the pulse, then the pulse laser with narrow pulse width and high peak power will be generated at a very fast speed in a very short time, which is usually called giant pulse.

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