Cr,Tm,Ho:YAG

Wavelength               2.080μm

Melting Point             1965℃

Orientation                <111>
Parallelism                 < 30"

Perpendicularity          ≤5′

Flatness                     ʎ/10

Surface Quality          10/5

Ho,Cr,Tm:YAG -yttrium aluminium garnet laser crystals doped with chromium,thulium and holmium ions to provide lasing at 2.13 microns are finding more and more applications,especially in the medical industry.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.  It has wide applications in surgery, dentistry, atmospheric testing, etc.

 

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

Customized

You can customise this product to your needs. If you do not find suitable specifications for your application please contact us for custom solution.