Ho, Cr, Tm: YAG – Doped With Chromium, Thulium And Holmium Ions
Product Description
The inherent advantage of the crystal crystal is that it employs YAG as the host. YAG’s physical, thermal and optical properties are well known and understood by every laser designer.
Diode or lamp lasers and runable lasers with tunable output between 1350 and 1550 nm employ CTH:YAG (Cr,Tm,Ho:YAG). High thermal conductivity, strong chemical stability, resistance to UV light, and a high damage threshold are all characteristics of Cr4+:YAG. American Elements adheres to applicable ASTM testing standards and produces to a variety of standard grades, including Mil Spec (military grade), ACS, Reagent and Technical Grade, Food, Agricultural and Pharmaceutical Grade, Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia), among others. There are standard and unique packing options. A Reference Calculator for converting between the many units of measurement that are important is also provided, along with other technical, research, and safety (MSDS) information.
Advantages Of Ho:Cr:Tm:YAG Crystal
● High slope efficiency
● Pumped by flash lamp or diode
● Operates well at room temperature
● Operates in a relatively eye-safe wavelength range
Dopant Ion
| Cr3+ Concentration | 0.85% |
| Tm3+ Concentration | 5.9% |
| Ho3+ Concentration | 0.36% |
| Operating Spec | |
| Emission Wavelength | 2.080 um |
| Laser Transition | 5I7 → 5I8 |
| Flouresence Lifetime | 8.5 ms |
| Pump Wavelength | flash lamp or diode pumped @ 780nm |
Basic Properties
| Coefficient of Thermal Expansion | 6.14 x 10-6 K-1 |
| Thermal Diffusivity | 0.041 cm2 s-2 |
| Thermal Conductivity | 11.2 W m-1 K-1 |
| Specific Heat (Cp) | 0.59 J g-1 K-1 |
| Thermal Shock Resistant | 800 W m-1 |
| Refractive Index @ 632.8 nm | 1.83 |
| dn/dT (Thermal Coefficient of Refractive Index) @ 1064nm | 7.8 10-6 K-1 |
| Melting Point | 1965℃ |
| Density | 4.56 g cm-3 |
| MOHS Hardness | 8.25 |
| Young’s Modulus | 335 Gpa |
| Tensile Strength | 2 Gpa |
| Crystal Structure | Cubic |
| Standard Orientation | |
| Y3+ Site Symmetry | D2 |
| Lattice Constant | a=12.013 Å |
| Molecular Weight | 593.7 g mol-1 |
Technical Parameters
| Dopant Concentration | Ho:~0.35@% Tm:~5.8@% Cr:~1.5@% |
| Wavefront Distortion | ≤0.125ʎ/inch@1064nm |
| Rod Sizes | Diameter:3-6mm |
| Length:50-120mm | |
| Upon request of customer | |
| Dimensional Tolerances | Diameter:±0.05mm Length:±0.5mm |
| Barrel Finish | Ground finish:400#Grit |
| Parallelism | < 30" |
| Perpendicularity | ≤5′ |
| Flatness | ʎ/10 |
| Surface Quality | 10/5 |
| AR coating Reflectivity | ≤0.25%@2094nm |
