Tm:YAG newly gets recognition for the development of AlGaAs laser diode. It is promising for wide application

in medical, military and meteorology fields.

Advantages of Tm:YAG Crystal
Eye-safe wavelength of 2μm range
Effective cross relaxing of Tm ions
Relatively high efficiency with LD pumping

Specifications

Dopant concentration

Tm: 0.5~5at%

Orientation

[111] within 5°

Wavefront distortion

≤ 0.125λ/inch @632.8nm

Extinction ratio

≥ 25dB @632.8nm

Rod sizes:

Diameter 2~10mm, Length 3~150mm
Upon request of customer

Dimensional tolerances

Diameter: +0.00/-0.05mm, Length: ± 0.5mm

Barrel finish

Ground or polished

Parallelism

≤ 10"

Perpendicularity

≤ 5′

Flatness

≤ λ/4@632.8nm

Surface quality

10-5 (MIL-O-13830A)

Chamfer

0.15±0.05mm

AR coating reflectivity

≤0.25% @2μm

Optical and Spectral Properties

Laser transition

3F4→3H6

Laser wavelength

1.87~2.16μm

Fluorescence lifetime

11ms

Diode pump band

785nm, 680nm

Physical and Chemical Properties

Crystal Structure

Cubic

Lattice Parameters

12.01 Å

Melting Point

1970℃

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/K(0~250℃)

[110]Direction:7.7×10-6/K(0~250℃)

[111]Direction:7.8×10-6/K(0~250℃)

Thermal Conductivity

14W/m/K(@20℃)

10.5W/m/K(@100℃)

Thermal Optical Coefficient (dn/dT)

7.3×10-6/K

Thermal Shock Resistance

790W/m

Solubility

Water: Insoluble;
Common Acids: Slightly