The working substance of the laser, the requirements for the working substance of the laser are:

A laser is a device used to emit narrow, monochromatic light.

The requirements for the working substance of the laser are as follows:1. Laser working substance: It is necessary to have a suitable working substance, with a suitable energy level and chain to sell Changbu, which can produce optical radiation of the appropriate wavelength.

2. Excitation: An excitation energy-pump source that can realize the inverted distribution of the number of particles of the working substance is required.

3. Optical resonator: an optical canopy resonator that can be selected for direction and frequency is required.

This question is somewhat inaccurate. The laser head structure of the laser cutting machine is as follows:

From top to bottom, the lenses inside the laser head are: collimating mirror, focusing mirror, and protective mirror.

Collimating mirror: After passing through the focusing mirror, the area of the focused spot is twice as large as the area of the point light just released from the energy fiber, and the energy density is 1 2.

Focusing mirror: The energy of the laser beam is used to cut, and the original beam of the laser must be focused through the lens to form a spot with high energy density. According to Gaussian optics, the power density is highest at the focal point.

Protective mirror: When the laser cuts the material, a large amount of gas and spatter will be released on the working surface, which will cause damage to the focusing lens in the laser cutting head, and a protective mirror is needed to protect the focusing lens.

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There are two kinds of lasers commonly used in metal processing, one is solid-state lasers, such as Hongnianzao gemstone lasers, glass lasers, yag lasers and chrysoberyl lasers; The other is gas lasers: such as CO2 lasers, argon lasers, etc. In addition to the working medium, the difference between them lies in the laser wavelength, output power, application range, etc.

Lasers generally consist of three parts:

1. Working substance: The core of the laser is not good, and only the substance that can achieve the energy level transition can be used as the working material of the laser.

2. Motivation and laughter energy: Its function is to give energy to the working substance, and excite the atoms from the low energy level to the high energy level of the external energy. Usually there can be light energy, thermal energy, electrical energy, chemical energy, etc.

3. Optical resonance cavity: the first function is to make the stimulated radiation of the working substance continuous; the second is to continuously accelerate the photons; The third is to limit the direction of laser output. In its simplest form, an optical resonance cavity consists of two mirrors placed parallel to each other at the ends of a HeNe laser.

When some neon atoms make a transition between two energy levels that have achieved the reversal of the number of particles, and emit photons parallel to the direction of the laser, these photons will be reflected back and forth between the two mirrors, so that they will continuously cause stimulated radiation, and soon produce a fairly strong laser light.

There are many crystals that can be used as laser working materials, among which the most common one is ruby.

Crystals, yttrium aluminum garnet crystals, yttrium crystals, titanium-doped sapphire crystals, lithium strontium fluorate crystals, etc.

Nowadays, there are many crystals that can be used as laser working substances, among which the most common ones are: ruby.

Crystals, yttrium aluminum garnet crystals, yttrium crystals, yttrium crystals, titanium-doped sapphire crystals, lithium strontium fluorate crystals, etc.