Chromium Doped Yttrium AIuminum Garnet
Cr:YAG
Chromium Doped Yttrium AIuminum Garnet (Cr:YAG or Cr4+:YAG) crystals are passive elements with excellent optical quality and homogeneity, which serve as excellent Q-switching optics for passively Q-switching diode pumped or lamp-pumped Nd:YAG, Nd:YLF, Yb:YAG or other with Nd and Yb doped lasers at wavelength from 1.0µm to 1.2 µm. Due to Cr:YAG has chemically stable, durable, UV resistant and high damage threshold, it will replace traditional materials, such as LiF, organic Dye and color centers for passive Q-switching. The good thermal conductivity of Cr:YAG is well suited for high average power applications. Also such material can be thermally diffusion bonded to Nd:YAG laser crystals or undoped YAG material with very low loss in the bonding interface section.
Optical and spectral properties | |
|---|---|
Transmission range in µm | 0,95‐1,12
|
Refractive index @1064 nm | 1,82 |
Initial transmission in % | 10-99
|
Initial absorption coefficient in cm-1 | 0,05-3
|
Damage threshold in MW/cm2 | 500-1000
|
Physical properties | |
|---|---|
Density in g/cm3 | 4,56
|
Crystal structure | cubic |
Temperaturbereich in °C | -60 ‐ +60
|
Thermal conductivity in W/(m · K) | 12,13
|
Mohs hardness | 8,5 |
Recovery time in µs | 8,5
|
Fluorescence lifetime in µs | 3,4 |
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