Views: 0 Author: Site Editor Publish Time: 2024-10-22 Origin: Site
1550nm refers to a laser with a wavelength of 1550 nanometers. Nanometer is a unit of length, and 1 nanometer is equal to a meter. This wavelength is in the infrared band, and infrared is divided into near-infrared, mid-infrared and far-infrared. 1550nm belongs to the laser in the near-infrared band.
There are many media that produce 1550nm lasers. For example, erbium-doped fiber lasers can produce lasers around 1550nm. In erbium-doped fibers, erbium ions (Er⊃3;⁺) are the key to achieving laser emission. When pump light (usually light with a shorter wavelength, such as 980nm or 1480nm) is injected into erbium-doped fibers, erbium ions absorb the energy of the pump light and transition from the ground state to the excited state. Then, erbium ions achieve energy level transitions near the wavelength of 1550nm and emit lasers through processes such as non-radiative transitions.
In the medical and beauty fields, 1550nm laser can penetrate skin tissue to a certain depth. The light absorption and scattering characteristics of human tissue for 1550nm wavelength determine that it can be used for some skin treatments. For example, in laser beauty, it can be used for skin rejuvenation, wrinkle removal and other projects. Under appropriate energy, it can stimulate the regeneration of skin collagen, while causing relatively little damage to the surface of the skin. In laser surgery, lasers of this wavelength can also be used for some soft tissue surgeries that require precise cutting and coagulation, because its penetration depth and thermal effect in the tissue can be better controlled.
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