Photonics Dictionary

YAG crystal

A YAG crystal refers to a solid-state crystal made of yttrium aluminum garnet (YAG), which is a synthetic crystalline material. YAG crystals are known for their exceptional optical properties, including high transparency over a wide range of wavelengths, high thermal conductivity, and resistance to mechanical and thermal shock.

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These crystals are extensively used in various applications, including:

Laser technology: YAG crystals are commonly used as laser gain media in solid-state lasers. When doped with certain elements like neodymium (Nd), erbium (Er), or chromium (Cr), they can emit laser light at specific wavelengths, making them valuable in industrial, medical, and military laser systems.

Optical components: YAG crystals are utilized in optical components such as lenses, windows, and prisms due to their optical clarity and durability.

Laser cutting and welding: YAG lasers are employed in materials processing applications such as cutting, welding, and marking metals and ceramics.

Medical applications: YAG lasers find application in various medical procedures, including dermatology (for skin treatments), ophthalmology (for eye surgery), and dentistry (for dental procedures).

Overall, YAG crystals play a crucial role in a wide range of technological and scientific fields due to their excellent optical and thermal properties, making them indispensable in various laser and optical systems.
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