Home > Products > Optical Mirror & Crystals > YAG-004
Item: YAG-004
Item: YAG-004
Product Name: Ho:Cr:Tm:YAG
Ho:Cr:Tm:YAG is a high efficiency laser material which lasers at 2.1μm. It has wide applications in medical, military and meteorology fields.
Advantages of Ho:Cr:Tm:YAG Crystals
High slope efficiency
May be flash lamp or diode pumped
Operates well at room temperature
Operates in a relatively eye-safe wavelength range
Material and Specifications
| Dopant concentration | Ho:0.3~0.4at%, Tm:5~6at%,Cr:0.3~1.2at% |
| Orientation | [111] within 5° |
| Wavefront Distortion | ≤0.125λ/inch(@1064nm) |
| Extinction Ratio | ≥25 dB |
| Rod Sizes | Diameter:3~6mm, Length:50~120 mm Upon request of customer |
| Dimensional Tolerances | Diameter:+0.000"/-0.005", Length: ± 0.05" |
| Barrel Finish | Ground Finish: 400# Grit |
| Parallelism | ≤30" |
| Perpendicularity | ≤5' |
| Flatness | λ/10 |
| Surface Quality | 10-5 |
| Chamfer | 0.006"±0.002" |
| AR Coating Reflectivity | ≤ 0.25% (@2940nm) |
Optical and Spectral Properties of Ho:Cr:Tm:YAG Crystals
| Laser Transition | 5I7 - 5I8 |
| Laser Wavelength | 2.097 μm |
| Photon Energy | 9.55 x 10-20 J |
| Emission Cross Section | 7 x 10-21 cm2 |
| Index of Refraction | 8.5ms |
|
Index of Refraction |
1.80 @2.08 μm |
| 4 nm | |
| 781 nm | |
| 400~800 nm |
Physical and Chemical Properties
| Crystal Structure | Cubic |
| Lattice Parameters | 12.01 Å |
| Melting Point | 1970oC |
| Moh Hardness | 8.5 |
| Density | 4.56±0.04g/cm3 |
| Specific Heat (0-20) | 0.59J/g.cm3 |
| Modulus of Elasticity | 310GPa |
| Young's Modulus | 3.17×104Kg/mm2 |
| Poisson Ratio | 0.3(est.) |
| Tensile Strength | 0.13~0.26GPa |
| Thermal Expansion Coefficient | [100]Direction:8.2×10-6/oC(0~250oC) |
| [110]Direction:7.7×10-6/oC(0~250oC) | |
| [111]Direction:7.8×10-6/oC(0~250oC) | |
| Thermal Conductivity | 14W/m/K(@20oC) |
| 10.5W/m/K(@100oC) | |
| Thermal Optical Coefficient (dn/dT) | 7.3×10-6/oC |
| Thermal Shock Resistance | 790W/m |
| Solubility | Water: Insoluble;Common Acids: Slightly |