Er:YAG laser is a solid pulse laser with a wavelength of 2.94um, Its wavelength is right at the highest absorption peak of water. Its absorption efficiency is 200 times of 2.1um Ho:YAG laser, 10,000 times of the 1.06um Nd:YAG laser. Based on this feature, it can be used for precise cutting and soft tissue ablation, with less thermal diffusion and mechanical damage to adjacent tissues. When the krypton laser pulse acts on the skin, the energy is quickly absorbed by the tissue, causing rapid warming of the superficial skin, resulting in instantaneous vaporization separation and precision exfoliation of the tissue. Because of its achievable and precise cutting, Er:YAG laser can be used for medical Laser microtherapy, such as skin medicine, dentistry, cardiology, ophthalmology, etc.
Theotry
The main components of device are:
Gain medium - Nd YAG
The working medium of the laser here is doped with trivalent erbium ions in yttrium aluminum garnet crystal so that infrared laser with wavelength of 1064nm can be emitted.
We use LiNbO3 crystal as Q-switch， Because LiNbO3 has a high transmittance to light with wavelength of 2940nm. Both ends of LiNbO3 crystal are cutting against Brewster’s angle(OB=650).meanwhile, it polarizes lase and is the Q-switch of lase. As a result, we don’t need a independent polarizer any more., The insertion loss in the resonant cavity is reduced.
Q-switch：LiNbO3 crystal
Feature
- More accurate and safe grinding
- Minimal thermal damage
- suitable for both superficial treatment and deep grinding
- The risk of scar formation and pigmentation changes is greatly reduced
- Most treatments do not require anesthesia
- The healing period is short and the side effects are low
- The skin tissue recovered quickly after surgery
Applications of 2940nm laser in medicine
- Erbium laser hydrates and softens the skin
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The skin tissue of the human body contains a lot of water, The skin has a very high light absorbance for a wavelength of 2.94. the absorption of light at this wavelength is low in the subcutaneous and muscle tissues with high pigment content. Erbium laser can accurately transmit therapeutic energy and biological information to skin tissue and effectively treat it without effecting tissues around skin. So erbium laser is the only laser that can be used for skin treatment. |
- Erbium laser therapy for the edge scar of the transplanted skin
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| The 2940 nm erbium laser can significantly improve the hardness, color and unevenness of the scar on the edge of the graft. | |
- Others
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| Erbium laser wrinkling | Erbium Laser-Mole-Removal |
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| laser remove acne scars | |
- caries removal
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| Minimally invasive, precise treatment,Selective caries removal, reduce postoperative infection, provide reliable bonding surface, no smear layer and microfissure. | |
- Removal of gingiva melanin
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| A small amount of anesthesia, no pain immediately after operation, the treatment effect is obvious. | |
- Excision of Swelling
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| Can use less or no anesthetics, less bleeding, no suture, simple surgery, rapid healing, postoperative pain and discomfort. | |
- Frenulum lengthening
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| Intraoperative bleeding is less, the vision is clear, no anesthesia is needed, postoperative swelling is absent, pain and discomfort are reduced, healing is rapid, the healing time of laser treatment is about 5-7 days, and the healing time of traditional treatment is about 2 weeks | |
- Crown Lengthening
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| Closed crown lengthened, no flap removal is needed, the surgical process is simplified, the treatment time is shortened, the postoperative reaction is small, and the recovery is quick | |
- Others
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Minimally invasive gingival removal,No anesthetic |
Safety biopsy |
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The only laser available for biopsy |
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Dentin desensitization |
laser gingival retraction |
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The effect is lasting ,stable and quick |
Simple and quick, no discomfort, no anesthetics |
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Periodontal pocket debridement |
Two stage surgical exposure of implant |
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Assisted periodontal treatment, intraspecific sterilization, gallstones removal, epithelialization, and its biological stimulation can promote tissue healing |
It is minimally invasive and does not harm the implant and surrounding tissues. Most of them do not require anesthesia. The healing time of laser treatment is 3 days, and the healing time of traditional treatment is 2-4 weeks |
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Aphthous ulcer, herpes simplex |
Tooth surface cleaning |
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Sterilization and burning of nerve endings in the disease, shortening the inflammatory process to reduce pain, and quickly relieving discomfort |
Effective sterilization to the pit groove, no vibration, faster and more comfortable |
Kamal Alameh says
Dear Sir/Madam,
I am looking for a 2940nm pulsed Er:YAG laser capable of generating 0.3-0.4ms duration pulses of energy 800-1800 mJ at 100-400 Hz repetition rate. Can you make this laser ?
Thanks and best regards,
Professor Kamal Alameh
ECU, Australia