We all know that 650nm laser diode is widely used in daily life, especially in medical treatment. So do you know what role it plays? Let's take a look at it together.

650nm laser diode, to put it bluntly, is what we often call "red laser", the kind of deep red light that can be directly seen by the naked eye. Although it is mild in color and not dazzling in brightness, in fact, it has a very wide range of functions in the medical field, and many people may have been exposed to it in hospitals or home physiotherapy equipment, but they just didn't realize that it was actually a 650nm laser.

I am engaged in laser diode technology myself, and I have contacted many medical device manufacturers. The laser in this band is basically "standard" in their equipment. Why? Because the wavelength of 650nm is just in the range of red light and visible light, it has moderate penetration and stable energy, and has a mild biological stimulation effect on skin, mucosa and blood. It doesn't "burn" like infrared, but it can go deep into a certain depth to play a role, so it is often used for "low energy laser therapy" (LLLT) in medical lasers.

In addition to physical therapy, 650nm laser is also commonly used in dentistry, beauty, ophthalmology and other fields. On the dental side, doctors will use red laser to reduce gingival inflammation and promote postoperative healing. I once saw a portable dental laser pen at a medical exhibition. It was a small pen with a 650nm diode inside. The output power was only a few tens of milliwatts, but it could relieve toothache and inflammation in a short time.

Beauty industry also likes to use this band. Like some home beauty instruments and red light skin rejuvenation instruments, collagen regeneration is actually stimulated by 650nm laser. After the skin absorbs red light, the metabolism is accelerated, the pores are tightened, and the skin color becomes brighter. This concept of "phototherapy beauty" has been very popular in recent years, but the underlying principle has long been medically verified.

There is also a more professional use, which is "laser acupuncture". Traditional acupuncture relies on acupuncture points, while laser acupuncture directly irradiates points with 650nm laser, which can stimulate meridians and regulate qi and blood without puncture. This kind of equipment is also very common in the rehabilitation and physiotherapy departments of hospitals.

Of course, we also know that the 650nm laser is safe, but it can't be used casually. After all, it is a laser, and it is still risky to look straight at the eyes for a long time. Therefore, protective measures will be added to medical equipment, such as limiting power, limiting irradiation time, adding optical fiber optical head and so on.

To tell the truth, the "medical value" of 650nm laser is not what it can burn, but what it can activate. It is the kind of gentle energy that helps cells recover and tissues regenerate. Don't underestimate this little red light. Sometimes, for chronic patients and patients recovering from surgery, its effect is more stable and lasting than taking medicine.