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Types of Laser

Alexandrite Laser
Alexandrite Laser

An alexandrite laser is one that uses an alexandrite crystal is used as the laser source or medium. The alexandrite laser produces a specific wavelength of light in the infrared spectrum (755 nm). It is considered a red light laser.

source: dermnetnz.org
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Diode Laser
Diode Laser

A laser diode, also known as an injection laser or diode laser, is a semiconductor device that produces coherent radiation (in which the waves are all at the same frequency and phase) in the visible or infrared (IR) spectrum when current passes through it.

Erbium
Erbium

Erbium laser resurfacing is designed to remove surface-level and moderately deep lines and wrinkles on the face, hands, neck, or chest. One of the benefits of erbium laser resurfacing is minimal burning of surrounding tissue.

source: webmd.com
Holmium
Holmium

Holmium is a chemical element with symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a rare-earth element. Holmium was discovered by Swedish chemist Per Theodor Cleve.

IPL Hair Removal
IPL Hair Removal

IPL is a popular hair removal treatment that helps kill the hairs, so they don’t come back. Unlike laser hair removal, IPL does not use a laser light source but instead uses a broad spectrum high-intensity light that emits light at multiple wavelengths. While laser devices emit one single focused wavelength to maximize follicle absorption, IPL covers larger patches of hair. IPL is like using a strong light bulb and is usually cheaper than laser treatments.

source: oglf.org
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Nd:YAG Laser
Nd:YAG Laser

Nd:YAG lasers emitting light at 1064 nm have been the most widely used laser for laser-induced thermotherapy, in which benign or malignant lesions in various organs are ablated by the beam. In oncology, Nd:YAG lasers can be used to remove skin cancers.

Neodymium
Neodymium

Nd:YAG laser. Nd:YAG (neodymium-doped yttrium aluminium garnet; Nd:Y3Al5O12) is a crystal that is used as a lasing medium for solid-state lasers.

Promethium
Promethium

Promethium 147 isotope is doped onto a lead-indium-phosphate glass etalon, leading to the production of four-level laser emission of wavelengths 933 and 1098nm.

source: azooptics.com
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Ruby Laser
Ruby Laser

A ruby laser is "A laser that uses a ruby crystal to produce an intense narrow beam of coherent red light, used in light transmission communication and for localized heating." (Free dictionary definition). Some input from Wikipedia about ruby lasers: A ruby laser is a solid-state laser that uses a synthetic ruby crystal as its gain medium.

source: quora.com
Thulium
Thulium

Thulium, 69 Tm; General ... with minimal coagulation depth in air or in water. This makes thulium lasers attractive for laser-based surgery. X-ray source

Ytterbium
Ytterbium

Ytterbium (Yb) is a chemical element belonging to the group of rare earth metals. In laser technology, it has acquired a prominent role in the form of the trivalent ion Yb3+, which is used as a laser-active dopant in a variety of host materials, including both crystals and glasses.