In the laser market, the semiconductor laser therapeutic instrument is the most popular one at present. So do you know the working principle and use of this product? Let's take a look at it together

The core component of semiconductor laser therapeutic instrument is actually a laser diode (LD). After electrifying, the laser diode emits light with specific wavelength (commonly 650nm, 808nm, 980nm, 1470nm), which is focused by optical fiber or lens and irradiated to the focus of human body.

When the laser enters the tissue, it will be absorbed by the cell mitochondria, promoting the production of ATP (adenosine triphosphate), which is simply "activating the cell's energy factory", making the metabolism faster and the repair ability stronger.

At the same time, local microcirculation is improved, inflammatory reaction is reduced, and nerve endings are excited, thus playing the role of analgesia, anti-inflammation and promoting healing.

The structure of semiconductor laser therapeutic instrument;

1. Laser emitting module: The core is laser diode, sometimes with optical fiber output.

2. Drive control circuit: responsible for providing constant current drive for LD to ensure power stability.

3. cooling system: most of them use TEC (thermoelectric refrigeration)+air cooling or water cooling to control the temperature.

4. Optical system: including collimator, focusing or beam splitter, so that the laser can accurately illuminate the target area.

5. Operation interface and safety control: set power, time and pulse frequency, with anti-misoperation and emergency stop.

For us who are engaged in devices, the key lies in "stable output" and "constant temperature control". Because the laser diode is most afraid of heat, the wavelength will drift when the temperature is high, and the power is unstable.

Different wavelengths correspond to different purposes.

The penetration depth and absorption characteristics are different with different laser wavelengths. Briefly classify:

650nm (red light): shallow penetration, mainly used for epidermis and mucosa, such as wound healing, skin repair and gingivitis treatment.

808nm (near infrared): the penetration depth can reach 2-3 cm, which is often used for muscle pain, arthritis and soft tissue injury.

980nm: stronger absorption, used in vascular closure, pain physiotherapy, varicose veins and so on.

1470nm: The water absorption rate is high, and it is often used for tissue vaporization and medical surgery, such as nasal surgery and hemorrhoid treatment.

Semiconductor laser therapeutic devices are really widely used, and machines with different powers and wavelengths are also very different. Common applications can be roughly divided into four categories:

Pain physiotherapy

Such as cervical spondylosis, lumbar muscle strain, scapulohumeral periarthritis, rheumatic joint pain. Laser can improve local blood circulation, promote metabolism and relieve pain.

Surgical class

Laser has high energy density, which can realize "cutting+coagulation+disinfection".

It is common in otolaryngology, urology, anorectal department, such as tonsil ablation and hemorrhoids surgery.

In the past, it was easy to bleed when using electrotome, but now using 1470nm laser, the wound is small and the recovery is fast.

Skin and beauty category

Low-power red laser can be used for acne, red blood and skin repair; High-power near-infrared laser is used for hair removal, skin rejuvenation and scar removal.

The reason why beauty instrument manufacturers like semiconductor laser is that it can accurately control energy and is not easy to cause skin burns.

The principle of semiconductor laser therapeutic instrument is to use specific wavelength laser and tissue cells to produce photobiological effect, thus playing the role of anti-inflammatory, analgesic and promoting repair. Whether it is physical therapy, surgery, beauty or dentistry, it is gradually replacing the traditional treatment.