Double Blue Laser Different laser types, green, red, and blue?
All i know about these different lasers is that the green one has doubling crystals and blue one has better doubling crystals. I want a laser that goes very far, but it not harmful. i know green one and blue ones can cut, but can i find a green one that is not destructive or a red one that goes far and is not destructive. in other words what lasers are harmful and cut?
You're right that most green lasers (532 nm) are frequency doubled YAG beams (from the fundamental wavelnegth of YAG @ 1064 nm), but you're mistaken about blue lasers. UV output (what you are calling 'blue') can be generated by third harmonic generation processes which are more like sum-frequency difference generation than actual 'tripling'. The UV @ 355nm is actually a mixture of IR and green outputs, and requires a different crystal after the 2nd harmonic crystal that produces the green, together with the IR the 2 wavelnegth combine in a sort of complex way to generate UV. Blue light can be generated directly in the 400~nm range (which is actually visible blue, not really yet UV) from laser diodes, but the powers are pretty small.
Several factors determine the 'class' of a laser, which is a catergorization of it's danger (class I, II, IIIa, IIIb, and c - from most to least dangerous). Main factors are wavelength and peak power, but also considered are pulsewidth and spot size of the beam. The same energy for different spot sizes will vary energy density on a target (like human flesh or the eye or a piece of steel), so smaller beam sizes may have higher energy densities and be more harmful than larger beams where the energy is spread out over a larger area - like the difference between sitting one's butt on a single nail vs. lying flat on a whole bed of nails - the impact is distributed evenly over the surface of the beam (for some beams). Now, another factor that can determine the danger of a laser is it's pulse shape - is it a Guassian beam (with a peak power in the center) or is it a flat top beam (with equal power levels at each point in the beams 2D cross-section).
UV beams tend to absorb more easily by human skin and tissue, and will hurt more if you get zapped by them. Visible lasers can usually only hurt the eye, but can be damaging so be careful. Always wear safety goggles rated at the optical density of the laser you are using (according to the factors I've mentioned - primarily wavelength and power and spot size).
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Do you want your tattoo removed, the laser way?
Laser tattoo removal
Laser tattoo removal works on the principle of selective thermolysis where the targeted tattoo is exposed to the energy delivered by laser. This energy exposure results in selective destruction of the foreign pigment while ensuring minimum damage to the surrounding skin.[if !supportLineBreakNewLine]
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Lasers can be applied to remove all sorts of tattoos be it professional, amateur, cosmetic, medicinal, and traumatic tattoos. The different colors present in the tattoos may respond differently to laser tattoo removal, but they do get removed to quite some extent. Thus laser tattoo removal presents itself as a non-invasive and effective treatment for unwanted tattoos.
The right candidate
Anyone with a need to remove an undesired tattoo can opt for laser tattoo removal. It is not the person’s physical characteristics, which decide the extent of removal, but the colors used. Though most tattoo colors can be eliminated or lightened more or less, skin colored tattoos may undergo irreversible ink darkening. This may be the case with white, pink, flesh-toned and light brown tattoo inks. Also red ink tattoos may turn black. In these situations do ask or say yes to a test dose.
Some Facts
Although, laser tattoo removal for sure is the best solution to the unwanted tattoo woes; it has got its warts, which need to be kept in mind. Some of them are:
1. Since results are color dependent total elimination is not possible, however you can be sure of dramatic lightening. Amateur black tattoos respond more quickly than professional and multicolored tattoos.
2. To get maximum benefit multiple sessions are usually required.
3. Doubly treated tattoos may require additional treatments.
4. If the tattoo is multicolored, it would require exposure to lasers of several different wavelengths because of the selective absorption characteristics of a particular color.
Types of lasers used
Q-switched Ruby Laser (QSRL)
It is a red colored laser, which works best for dark blue and black inks. With tattoos in these colors, results have been exceptional. So far as red and yellow color is concerned results have been less than satisfactory. The response of green tattoos is variable. The QSRL is also effective in treating medicinal and traumatic tattoos.
Q-switched Nd:YAG
This laser works both for amateur and professional tattoos of all colors. But best results have been observed in case of black tattoos, as is the case with the ruby laser. Moreover this laser works quite well for darker skinned individuals. Also unlike QSRL, which is ineffective in case of red and yellow color, Q-switched Nd:YAG is highly effective for these colors in frequency doubled setting (532 nm).
Q-switched Alexandrite Laser
This laser is quite like QSRL in treating tattoos especially when treating green tattoos. However up to 50% of patients can experience textural changes in their skin after treatment.
Flash lamp-pumped Pulsed Dye Laser
This laser does not penetrate deep into skin because of its wavelength, which is 510 nm. Hence it is not so useful when it comes to deeper tattoos. However, it is effective for the treatment of brightly colored tattoos such as those that use red, purple, and orange inks. The major side effect of this laser is bruising.
Post-procedural Care
After the procedure some swelling and blistering is commonplace, so is crusting. So don’t panic they will go by themselves after some time. Do take good care of the wound to aid the healing process and to prevent infection.
To ensure fast and safe healing, make use of prescribed antibiotic ointment with regular dressing changes. If you feel the need of alleviating any resultant pain, consult the physician to recommend you some painkiller. Also avoid exposure to sun to prevent tanning.
Conclusion
Laser tattoo removal has brought an effective, less painful solution to people who want to get their tattoos removed or faded.
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