Differences between the different types of lasers

Sep 10, 2021 Uncategorized

Photo epilation is hair removal by light and, in this term, both pulsed light and the different types of laser that have some action on the hair are included.

Types of Laser

It is on a physical level where we find the biggest and most important difference between the types of lasers. Physicists call the light in two ways:

Incoherent light. It is one that spreads in all directions from its source. It can be both sunlight and light from a lamp.

Consistent light. It is one that propagates in a single direction, in a beam, and that “vibrates” at a specific wavelength, and it is this wavelength that makes it sensitive to the objective for which it was developed. We call this objective a chromosphere, and in the case of hair removal it is melanin, which gives hair color and is more sensitive to light at a wavelength between 750 and 800 nm.

The laser at depilatory wavelengths is in the spectrum of infrared light, making it invisible to our eyes. The red light that can be observed during a hair removal session is not the laser itself, but rather a guiding light that helps guide us during treatment. The laser is usually of a single wavelength (at most two, depending on the manufacturer).

What is pulsed light?

The pulsed light is a way to transform the incoherent light from a high – energy (usually a xenon lamp) through a series of filters, as more like a beam of light from one direction. Pulsed light is a more versatile device since it incorporates several wavelengths in a single machine and can be used for rejuvenation, hair removal or even vascular treatment.

Depending on the filter we use, we will have a certain wavelength, which ranges between 500 and almost 1300 nm. To understand us, use a system similar to the one we have with a magnifying glass when we put it in the direction of the sun and we get a higher energy light concentrate, capable of burning paper.

So far the physical differences between Optimum Laser Hair Removal Manhasset and pulsed light. On a practical level they are somewhat more difficult to appreciate.

Is pulsed light or laser hair removal better?

Actually, it is the specialist who must determine which is the appropriate method for each moment and type of skin. Much of the bad reputation of pulsed light comes from the fact that, being, in general, a device for non-medical use, but for cosmetic use, it is in the hands of non-health personnel, less experienced and trained, while the laser itself is a device for medical use, required to be supervised by a doctor and performed by health personnel in clinics duly authorized by each autonomous community. So a pulsed light, in good hands, will probably be almost as effective as a laser, but it will take quite a few more sessions.

That is why the ideal is to go to centers that have the entire light platform, so that the doctor who treats you can choose from the entire therapeutic arsenal which machine is the right one for each person and treatment phase.

Types of lasers

These are the types of lasers that are used in laser hair removal clinics.

Ruby (694 nm). It is indicated in light phototypes (I to III), with dark hair.

Alexandrite (755 nm). To treat phototypes II to IV and brown or dark hair.

Diode (800 nm). To treat tanned skin and phototypes from I to V and for multiple applications.

Neodimino Yag (1064 nm.). It is a very appropriate laser for skin photo types I, II and II.

Intense Pulsed Light IPL: with a non-invasive mixed light. Its main advantage is versatility and therefore more types of skin and hair can be treated.

Difference between Alexandrite laser and Diode laser

It should be known that Alexandrite and Diode are two lasers that have a very similar wavelength and the small difference in wavelength makes the Diode penetrate the skin a little further, making it more suitable for slightly darker skin than Alexandrite.

And, although physically the Diode also generates more energy per screen, in practice this is only anecdotal since Alexandrite, although theoretically it shoots less energy, it does so in a much shorter time, with what the energy that in the end reaches the follicle is very similar. To understand the differences, the firing of an Alexandrite lasts between 5 and 40 ms and that of a Diode between 75 and 200 ms.

Then there are different cooling technologies to compensate for the pain that may be felt during laser hair removal.

Do you know the type of laser you need?

There are hundreds of hair removal centers on the market where an average of 25,000 patients attend a year for treatment. However, one of the main discontents with these treatments is the lack of effectiveness of the treatment.

Five types of hair removal lasers are currently in use: Alexandrite, Diode, Pulsed Light, Soprano, and Neodymium Yag. There is a popular belief that some are better than others; however the scientific reality is that depending on the type of patient, the hair removal area and other factors to be determined by the medical team, they are all good, and it is even advisable to combine them.

“Each of these hair removal lasers is very effective as long as it is used with the appropriate characteristics of each patient at all times.It cannot be said that a given laser is the best for hair removal. Each system has its advantages and disadvantages. Each hair removal equipment has its applications and the patient must be studied and evaluated so that the most suitable laser is chosen according to their skin, hair and the area to be waxed. As the sessions progress, the amount of residual hair is less and it is also miniaturized, so you have to change parameters and often the type of laser, ” explains Emma Hermida.

Choice of laser

According to the report, the average number of laser hair removal sessions ranges between 6 and 8 between these periods, the hair and skin of each patient changes, the hair weakens and the skin goes through different stages. In this way, it is convenient in many cases to vary the laser according to the new characteristics of the patient to achieve optimal hair removal in each session.

“In the end, opting for a clinic with all lasers in each session optimizes the effectiveness of the treatment, the patient will wax in fewer sessions and therefore saves money “, concludes Hermida.

Of the VI skin photo types that exist in Spain, the vast majority are between III and IV.

We must also differentiate between medical and aesthetic laser:

Medical lasers (only available in clinics) are characterized by the possibility of using high energy flows, which make it possible to disable the cells that give rise to hair. In this way a permanent hair removal is obtained.

The aesthetic lasers (used in beauty salons, hair salons, gyms, etc.) , on the other hand, have a minimum energy, which fails to neutralize these cells, which results in a temporary hair removal or a progressive weakening of the hair but not her total removal, and its prices are lower but in the long run a total hair removal does not occur.

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