Cr4+:YAG (Y3Al5O12) 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 1.0 to 1.2 µm. Because of its high damage threshold (> 500 MW/cm2) and being easy to be operated, it will replace LiF and Dye which are commonly used as passive Q-switching materials.
| Formula: | Cr4+:Y3Al5O12 |
| Crystal Structure: | Cubic Garnet |
| Density: | 4.56 g/cm3 |
| Hardness: | 8.5 (Mohs) |
| Damage Threshold: | > 500 MW/cm2 |
| Refractive Index: | 1.82 @ 1064 nm |
| Flatness: | < l/8 |
| Wavefront Distortion: | < l/4 |
| Parallelism: | < 30" |
| AR-coating: | R<0.2% @ 1064 nm |
CASIX provides Cr4+:YAG with Cr4+ doping level from 0.5 mol% to 3 mol%. The size could be from 2x2 mm2 to 12x12 mm2 with length from 0.1 mm to 12 mm. AR-coatings and HR-coatings are also available. We can control the initial transmission from 1% to 99% according to customers?requirements.
The preliminary experiments of CASIX's Cr:YAG showed that the pulse width of passively Q-switched lasers could be as short as 9 ns for diode pumped Nd:YAG lasers and repetition as high as 10kHz for diode pumped Nd:YVO4 lasers. Recently, passively Q-switched Nd:YVO4+ Cr:YAG lasers and green lasers (KTP) were added into CASIX's diode pumped solid-state lasers.
Cr:YAG is also a laser crystal with tunable output from 1.35 mm to 1.6 mm. It can generate ultrashort pulse laser (to femto-second) when pumped by Nd:YAG laser at 1.064 mm
When ordering Cr4+:YAG crystal, please specify the size, initial transmission and coatings.
Copyright 1998 CASIX, Inc. All rights reserved.
Last Revised: October
20, 1998
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Basic Properties of Cr4+:YAG: