What is the frequency of Nd:YAG laser?
532 nm
The laser is an NPRO-type Nd:YAG laser (laser system ‘Prometheus’ provided by InnoLight GmbH, Hannover, Germany) at a fundamental wavelength of 1064 nm, internally single-pass frequency-doubled to 532 nm. The laser provides 1 W output power at 1064 nm and 20 mW at 532 nm.
Which pump is used in Nd:YAG laser?
optical pumping
The laser- active material which, in the case of the Nd-YAG laser, is excited by optical pumping, consists of Neodymium atoms that are accommodated in a transparent host crystal (YAG = Yttrium Aluminium Garnet).
Where is Nd:YAG most commonly used *?
There are numerous ophthalmic applications for Nd:YAG lasers. They are most commonly used to treat posterior capsular opacification after cataract surgeryand to create a peripheral iridotomy in patients with narrow angles or angle-closure glaucoma.
What is wavelength of Nd:YAG laser?
Neodymium:Yttrium-Aluminum-Garnet Lasers The Nd:YAG lasers operate at a wavelength of 1064 nm. These lasers are fiberoptic-delivered contact lasers that generate a free-running pulsed beam of energy.
Is ND YAG laser ablative?
Background: Carbon dioxide (CO2 ) and erbium-yttrium aluminum garnet (Er-YAG) lasers are the gold standards in ablative skin resurfacing. Neodymium-doped yttrium aluminum garnet (Nd-YAG) laser is considered a nonablative skin resurfacing laser whose usage is limited due to its high cost.
What is the power output of Nd YAG laser?
As a result of thermal lens effects, a ceramic Nd:YAG laser with a doping rate of 2 at. % had a maximum output power of 2.2 W and an output power efficiency of 36.1% at a pump power of 6.2 W.
What is the power output of Nd:YAG laser?
Is Nd:YAG laser ablative?
How effective is Nd YAG laser?
Previous studies with the Nd: YAG laser in skin phototypes IV–VI have shown a hair reduction varying from 23 to 33% after a single session,[1,2,3,14] 58 to 62% after three sessions[13] and 50 to 100% after 5–7 sessions[4,8,9] respectively at 4–12 weeks follow-up.
What is a Nd:YAG laser used for?
Nd:YAG lasers are used in manufacturing for engraving, etching, or marking a variety of metals and plastics, or for metal surface enhancement processes like laser peening. They are extensively used in manufacturing for cutting and welding steel, semiconductors and various alloys.
What is frequency doubling in laser?
Frequency doubling is a frequently used technique for generating light with short wavelengths: Green light with wavelength 532 nm can be generated by frequency-doubling the output of a neodymium- or ytterbium-based 1064-nm laser (→ green lasers). Green laser pointers are also usually based on this approach.
What is the gain bandwidth of a YAG laser?
Nd 3+ :YAG is a four-level gain medium (except for the 946-nm transition as discussed below), offering substantial laser gain even for moderate excitation levels and pump intensities. The gain bandwidth is relatively small, but this allows for a high gain efficiency and thus low threshold pump power.
What are the properties of the Nd-YAG laser?
Nd:YAG laser consists of a four-level gain medium that offers extraordinary laser gain at moderate pump intensities and excitation levels. The gain bandwidth of the laser is relatively small, which in turn improves laser’s gain efficiency thereby minimizing threshold pump power. It emits infrared light in the range of 1064 nm.
How is the linewidth of Nd YAG different from Nd glass?
Linewidth is a measure of spectral purity (monochromaticity). For the cubic structure of Nd:YAG, linewidth is about 30 to 50 times narrower than Nd:glass, for example, making Nd:YAG relatively easy to phase match spectrally with harmonic generators to visible wavelengths.
Which is the best form of Nd YAG?
Nd:YAG is commonly used in its monocrystalline form, which is manufactured using the Czochralski growth method. However, large ceramic Nd:YAG of high quality are also being widely developed.