Cr4: YAG Crystals Passive Q-switching is preferred for simplicity of manufacturing and operation, low cost, and reduced system size and weight.
Cr4: YAG CRYSTALS
Chromium Doped Yttrium Aluminium Garnet ( Cr4: YAG) Crystals
Factory direct supplier of Cr4: YAG Crystals.
Passive Q-Switching is preferred for simplicity of manufacturing and operation, low cost, and reduced system size and weight. Cr4+: YAG (Y3Al5O12) crystals are excellent for passive Q-switching diode-pumped or lamp-pumped Nd: YAG, Nd: YLF, Yb: YAG or other Nd and Yb doped lasers at wavelengths from 1.0 to 1.2mm. Because they are chemically stable, durable, UV resistant, have good thermal conductivity, have a high damage threshold (>500mW/cm2) and ease of operation, they will replace traditional materials such as LiF, organic dye and color centers.
Basic Properties of Cr4+: YAG Crystalls
| Formula | Cr4: Y3AI5O12 |
| Crystal Structure | Cubic Garnet |
| Dopant Level | 0.03 mol% – 0.05 mol% |
| Hardness | 8.5 (Mohs) |
| Damage threshold | >500MW/cm2 |
| Refractive Index | 1.82 @1064nm |
The capability of Cr4+: YAG Crystal
| ATTRIBUTE | COMMERCIAL | HIGH PRECISION |
| Flatness | λ/4 | λ/10 |
| Wavefront Distortion | λ/4 | λ/10 |
| Surface Quality | 20-10 scratch and dig | 10-5 scratch and dig |
AR coatings and HR coatings are also available. the initial transmission (To) can be controlled from 10% to 95% according to customer requirements. Standard size Cr4+: YAG crystals of 3x3mm2 with To=80% or 90% are in stock and available for immediate delivery.
Preliminary experiments were done on Casix’s Cr: YAG crystals show that the pulse width of passively Q-switched lasers can be as short as 9ns for diode-pumped Nd: YAG lasers with repetition as high as 10kHz for diode-pumped Nd: YVO4 lasers. Furthermore, an efficient green output @532nm and UV output@355nm and 266nm were generated after a subsequent intra-cavity SHG in KTP for diode-pumped and passive Q-switched Nd: YAG lasers and Nd: YVO4 lasers.
Cr: YAG is also a laser crystal with tunable output from 1.35um to 1.6um. It can generate ultrashort pulse lasers (to fs pulsed) when pumped by Nd: YAG lasers at 1.064um.
| Orientation: | <111> or <100]> crystalline witdin 5° |
| Wavefront distortion : | l /8 per inch @ 633 nm |
| Extinction Ratio: | >25dB |
| Dimension Tolerances | Rods witd diameter: ±0.025 mm , Lengtd: ±0.5 mm |
| Surface quality: | 10/5 Scratch / Digper MIL-O-1380A |
| Parallelism: | < 10 arc seconds |
| Perpendicularity: | < 5 arc minutes |
| Flatness: | < l /10 @ 633 nm |
| chamfer: | <0.1 mm @ 45deg. |
| Barrel Finish: | 50-80 micro-inch (RMS) |
| AR Coating Reflectivity | < 0.25% |
Note: the other specification and dimension is available too
We are the manufacturer and supplier of Cr4.+: YAG Crystals and other Laser Crystal in China, welcome to factory inspection.