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Cr4+:YAG - Chromium Doped Yttrium Aluminum Garnet

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Cr4+:YAG - Chromium Doped Yttrium Aluminum Garnet
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  • Cr4+:YAG - Chromium Doped Yttrium Aluminum Garnet

  • Cr4+:YAG crystal is an excellent crystal for passively Q-switching pumped at wavelength from 0.8 to 1.2 μm. It features chemically stable, durable and easy to be operated.
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Introduction

Chromium Doped Yttrium Aluminum Garnet (Cr4+: YAG) is an excellent crystal for passively Q-switching diode pumped or lamp-pumped Nd:YAG, Nd:YLF, Nd:YVO4 or other Nd and Yb doped lasers at wavelength from 0.8 to 1.2 μm. Because of its chemically stable, durable, UV resistant, good thermal conductivity and high damage threshold (>500 MW/cm2 ) and being easy to be operated, it will replace traditional material, such as LiF, organic Dye and color centers. CASTECH provides Cr4+:YAG with Cr4+ doping level from 0.5 mol% to 3 mol%. The size could be from 2 × 2 mm2 to 14 × 14 mm2 with length from 0.1 mm to 12 mm available. We can control the initial transmission from 10% to 92% according to customers' requirements.

 

 

Table 1. Basic Properties

Crystal Structure

Cubic

Dopant Level

0.5 mol~3 mol%

Mohs Hardness

8.5 Mohs

Refractive Index, at 1064 nm 

1.82

Damage Threshold

500 MW/cm2 @1064 nm, 10 ns, 10 Hz (AR-coated) 

 

The preliminary experiments of CASTECH's Cr4+:YAG showed that the pulse width of passively Q-switched lasers could be as short as 5 ns for diode pumped Nd:YAG lasers and repetition as high as 10 kHz for diode pumped Nd:YVO4 lasers. Furthermore, an efficient green output @532 nm, and UV output @355 nm and 266 nm were generated, after a subsequent intracavity SHG in KTP or LBO, THG and FOHG in LBO and BBO for diode pumped and passively Q-switched Nd:YAG and Nd:YVO4 laser.

Cr4+:YAG is also a laser crystal with tunable output from 1.35 µm to 1.55 µm. It can generate ultrashort pulse laser (to fs pulsed) when pumped by Nd:YAG laser at 1.064 µm.

     

Note

When ordering Cr4+: YAG crystal, please specify the size, initial transmission and coatings. For further information, please contact CASTECH.

  • Laser Crystals_Chromium Doped Yttrium Aluminum Garnet Crystal(Cr4+ _YAG).pdf

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