What is the principle of water flow conduction laser and what is the principle of laser

The principle of laser:

The interaction between light and matter is essentially the manifestation of the microscopic particles that make up matter absorbing or radiating photons and changing their own motion at the same time. Microscopic particles all have a specific set of energy levels (usually these levels are discrete).

At any one time, a particle can only be in a state corresponding to a certain energy level (or simply expressed as being at a certain energy level). When interacting with photons, particles jump from one energy level to another and absorb or radiate photons accordingly. The energy value of the photon is the energy difference between the two levels e, and the frequency is = e h (h is Planck's constant).

The principle of laser, the most easy-to-understand introduction, come in and take a look.

When the laser is in contact with the working surface, it can be imagined that the rust will absorb energy with a small energy ball, and the rust will absorb energy, due to the short action time, the rust on the surface absorbs energy and vaporizes instantly, and cannot conduct heat downward, because the pulse width causes different effects.

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The excitation source inverts the number of particles in the medium. It can be electrical, light, thermal, chemical, and so on. Electrical excitation uses gas discharge to excite dielectric atoms; The various types of excitation are also figuratively referred to as pumping or pumping.

Only by continuous pumping can the number of particles in the upper energy level be more than that in the lower energy level, and the laser output can be continuously obtained.

3. With the first two, it can only ensure the reversal of the number of particles, but the stimulated radiation intensity generated in this way is very weak and cannot be applied practically, so it can be amplified with an optical resonator. The so-called optical resonator is actually installed at both ends of the laser with two mirrors with high reflectivity, one is fully reflective and the other is partially reflected, so that the laser can be emitted through this mirror, and the light reflected back to the working medium continues to induce new stimulated emission and the light is amplified. Therefore, the light oscillates back and forth in the resonator to cause a chain reaction, which is amplified like an avalanche, producing a strong laser light that is output from one end of the mirror.

According to the different working mediums, they can be solid, gas, liquid, and semiconductor lasers. Solid-state lasers are characterized by small devices, ruggedness, easy to use, and large output power, but the power supply is generally relatively large. For example, titanium-sapphire lasers are generally pumped with semiconductor lasers, often using annular cavities, which can be continuous or pulsed.

Causes light sources to emit light with a highly consistent and concentrated frequency.

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Laser is a light wave that also has.

nature. However. Lasers are the same as general.

There is a significant difference, the frequency of the laser is hundreds of millions of trillion cycles, which is more than 100,000 times the frequency of microwave (ultra). From the relationship between the wavelength and the velocity c and frequency, it can be seen that the wavelength of the laser is very short, so it.

Far worse than worse. Lasers, on the other hand, have peculiar particulate properties, which make them a striking "medium". And.

Basically similar, used on the sender side.

emitted by the laser as such.

The voice signal becomes fed through the microphone, and a certain parameter (frequency,

or phase) so that the voice signal is loaded on the laser light wave according to the change of voice, and is sent out through the emission (also known as the transmitting antenna) to propagate in the medium. At the receiving end, the receiving (also known as the receiving antenna) converts the laser signal into a voice signal in the opposite direction of the transmitting end.

According to the different transmission media, it can be divided into cosmic communication (laser in.

propagation), atmospheric communications (lasers in.

within the transmission),

Lasers propagate underwater) as well.

Lasers in. internal transmission).