Nd:YAG – Neodymium doped yttrium aluminum garnet

Absorption 808 nm | Emission 1064 nm

Nd:YAG (Yttrium aluminium garnet doped with neodymium Nd: Y3Al5O12) is an isotropic crystal with cubic symmetry. It is one of the most widely recognized oxide crystals used as an active medium in solid-state lasers. This crystal is light purple in colour. The primary advantage of Nd crystals are the presence of neodymium ions, which contribute to the lasing activity by replacing a small fraction of yttrium ions. These crystals are typically grown using the Czochralski technique. Although other growth methods are possible, the Czochralski technique offers significant advantages, including high optical quality and the ability to produce large-diameter crystals.

• Crystal advantages

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• >Nd:YAG is primarily used as a laser in industrial, medical, military, and scientific applications.
• >Its key advantages include high gain, low lasing threshold, high efficiency, superior optical quality, low losses, strong mechanical durability, good thermal conductivity, and excellent thermal shock resistance.
• >Suitable for various laser modes: continuous wave (CW), pulsed, Q-switched, mode locking, frequency doubling, and high-average power operations.
• >Nd:YAG laser rods provide efficient laser output at a wavelength of 1.064 µm.
• >Nd:YAG crystals have a relatively narrow gain bandwidth, which supports high gain efficiency and a low lasing threshold.
• >The robust nature of Nd:YAG crystals make them suitable for high-power continuous wave, high-intensity Q-switched, and single-mode operations.

• Applications

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• >In manufacturing, Nd:YAG lasers are used for engraving and etching a variety of metals and plastics.
• >In medical applications, Nd:YAG lasers are used in fields like endoscopy, urology, neurosurgery, gynaecology, dermatology, dental surgery, and general surgery, including treatments for conditions such as cancer and liver lesions.
• >Employed in range finders and illumination devices.
• >Applied in engineering for tasks such as resistor trimming and drilling.
• >Utilized in flow visualization techniques.
• >Deployed in spectrometry.