History of lasers

Historical facts

Albert Einstein was the first scientist who talked about the emergence of lasers as a completely new concept in physics. It was not possible to realize his theory at that time. In 1958, Arthur Schawlow proposed a concept that became a key breakthrough in optics and physics. In 1960, together with colleagues, he created the first device using a ruby crystal. The device generated red-colored light that had a wavelength of about 694 nm. During the same period, Charles Townes explored the use of gas as the active medium for a laser. His idea was a helium-neon device with infrared and red light.

Scientists continued to experiment with neodymium, a chemical element with a 60 atomic number. It became an effective source of the active medium in a laser. The neodymium-based laser light with a wavelength of about 1064 nm was created. The inventions of Schawlow and Townes began to be widely used in medical practice. In 1961 laser was used for the first time to remove tissues and coagulate vessels. This technique was improved and turned into various types of laser surgery. In the 80s, the devices began to be used for cosmetic procedures. One particular advancement was tattoo removal and skin rejuvenation treatments. Laser cosmetology became a popular technique against imperfections: pigmentation, scars, wrinkles.

The principle of action of the laser

Laser is a device that emits a light wave with a certain length. The basis of the functioning of the device is the ability of «excited atoms» of special materials to produce photons. Due to this, the emission of amplified light occurs. The equipment sends a monochromatic light wave, which is absorbed by media of a certain color. When the laser detects the desired color, the beam of the device penetrates the tissue and heats it. The rays are projected over a limited area, which allows for precise correction of the desired area. Scientists around the world are studying and improving the laser. Due to the fluctuating wavelengths, the device can be used on various structures.

Types of lasers

Manufacturers of equipment offer a wide range of lasers. Depending on the working body, there are types of devices:

• gas;

• solid-state;

• semiconductor;

• on metal vapors;

• on dyes.

Devices are divided by the length of the emitted wavelength and pumping source. Several types of devices are currently used in cosmetology and medicine: neodymium, alexandrite, carbon dioxide, ruby laser. Devices allow you to eliminate aesthetic skin defects, so they are divided by the nature of the impact and medical procedure into: grinding, pulsed, epilation, vascular, pigmentation and others.

Where are lasers used in medicine?

Laser-based equipment is widely used in medicine. Laser therapy reduces the risk of infection, causes less bleeding and damage to healthy tissue compared to standard surgical instruments. The main areas of use are:

• Cancer treatment;

• removal of vocal cord tumors;

• brain surgery;

• plastic surgery;

• gynecology.

The beam cauterizes cuts and stops bleeding in blood-rich tissues such as gums. Neodymium lasers penetrate the eye to weld detached retinas, cut inner membranes after cataract surgery. Lower intensity laser pulses are used to destroy abnormal blood vessels that have spread across the retina. Ophthalmologists use the latest excimer equipment to correct visual defects.

Laser application in cosmetology

One of the main advantages of lasers is a visible result. During procedures, there is an effective effect on the problem area, antibacterial properties are manifested. Equipment is constantly being finalized and improved, expanding the range of use of devices.

The most modern and safe way to get rid of unwanted hair with the help of a laser is laser hair removal. During the procedure, the light affects the hair follicles. Melanin absorbs the energy of the beam, heat is released, which leads to the destruction of the follicle. 3-4 sessions is enough to achieve the effect. The remaining hair lightens and thins. In the future, the procedure should be carried out much less often. For some people, the hair stops growing altogether. Before the sessions, specialists select the frequency and duration of the laser flash depending on the individual characteristics of the client. The best results of laser hair removal are obtained when removing dark hair on the background of light skin. A large amount of melanin causes rapid destruction, and light skin has a minimal risk of burns.

Laser resurfacing gives a visible effect:

• rejuvenation;

• wrinkle smoothing;

• removal of age spots;

• elimination of scars, scars, imperfections;

• restoration of the upper layers of the skin.

During the session, the dead skin cells are removed. The laser beam triggers regeneration processes and removes aesthetic imperfections. The full result of the procedures should be evaluated after a few months.

Removal of blood vessels - elimination of vascular mesh, asterisks on the face and body. It is important to identify the causes and main factors of problems by consulting an expert before starting to undergo sessions. The laser is directed at hemoglobin, which provides energy to the walls of blood vessels. Under the influence of the device dilated vessels disappear.

Removal of tattoos with the use of a laser device eliminates the appearance of scars. The rays pass through the skin layer and affect only the dye. In the process of destruction of molecules, the dye is discolored and gradually washed out due to regeneration. Based on the type of dye, the depth of its application specialist selects the duration and frequency of exposure to the laser.

Removal of papillomas — non-contact and non-traumatic procedure. Laser beam freely penetrates into the papilloma and seals the vessel that feeds it. After 5-7 days, the formation dries up and disappears.

The main advantages of alexandrite laser

In terms of physics, the alexandrite laser works on the basis of selective photothermolysis. The technique uses radiation with a wavelength of 755 nm. It is perfectly absorbed by melanin. Laser equipment is more often used for hair removal. Alexandrite laser has high precision, so that the tissues around the hair remain intact. The advantages of using the apparatus:

• efficiency and safety even for delicate procedures;

• no burns, injuries, scars, pigmentation;

• minimal discomfort;

• stimulation of natural collagen production;

• prevention of ingrowth of hairs;

• use on any part of the body.

Alexandrite hair removal laser procedure reduces the time it takes up to 50%. This reduces the number of sessions in a cosmetology facility.

Where to buy alexandrite laser?

Bimedis is a medical equipment marketplace with worldwide recognition. Choosing the site, each customer will find the best laser for hair removal, dental, surgical, care procedures. Reliable trusted sellers offer alexandrite lasers and other models of devices at a favorable price. To get professional advice, assistance and answers to questions you should contact managers.