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YAG


Undoped YAG crystal

YAG has some excellent optical and other properties.That seem to secure for its Optical elements an increasing part of the growing market for specific and demanding technological applications YAG shows a definitive comparative superiority to Optical Glass in the following technical characteristics:

  • Higher Index of Refraction
  • Very Low Spherical Aberration
  • High Thermal conductivity
  • No Trace Absorption at 2-3 nm

 

Neodymium doped Yttrium Aluminum Garnet Nd:YAG crystal

Nd:YAG crystal, which continues as the best of the rare earth garnet materials that are characterized by four-level laser operation which permits low threshold pulse and cw operation, is the most mature and widely used solid-state laser material adopted by R&D, medical, industrial and military customers. Its main and obvious advantages are: high gain, low threshold, high efficiency, low loss at 1.064 nm, as well as high optical quality, good thermal conductivity and thermal shock characteristics, stable chemical and mechanical properties, which make Nd:YAG as the most suitable and commercial laser material for various modes of operation (CW, pulsed, Q-switched, mode locked and cavity dumped).

 

Ytterbium doped Yttrium Aluminum Garnet Yb:YAG crystal

Yb:YAG is one of the most promising laser-active materials and more suitable for diode-pumping than the traditional Nd-doped crystals. It can be pumped at 0.94 nm and generates 1.03 nm laser output. Compared with the commonly used Nd:YAG crystal, Yb:YAG crystal has a larger absorption bandwidth in order to reduce thermal management requirements for diode lasers, a longer upper-state lifetime, three to four times lower thermal loading per unit pump power. Yb:YAG crystal is expected to replace Nd: YAG crystal for high power diode-pumped lasers and other potential applications, such as, its doubling wavelength is 515 nm very close to that of Ar-ion laser (514 nm),which makes it possible to replace large volume Ar-ion laser.

Measurement of density of YbYAG samples
 

Erbium doped Yttrium Aluminum Garnet Er:YAG crystal

Er: YAG combine various output wavelength with the superior thermal and optical properties of YAG. It is a well known material for medical applications.

 

New-type Nd:YAG crystal

Comparative Results of measurements of passive and generation parameters of Nd : YAG and high-power Nd:YAG crystals

 
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