Wavelength                    2.01μm


Melting Point                  1965℃

Density                          4.56 g cm-3

Ho3+ concentration        0.005 - 100 atomic %

Parallelism                        <10arc seconds

Perpendicularity                <5arc minutes

Flatness                             λ/10@ 633 nm

Surface quality                 10/5

Ho:YAG Ho3+ ions doped into insulating laser crystals have exhibited 14 inter-manifold laser channels, operating in temporal modes from CW to mode-locked [1]. Ho:YAG is commonly used as an efficient means to generate 2.1-μm laser emission from the 5I75I8 transition, for applications such as laser remote sensing, medical surgery, and pumping Mid-IR OPO's to achieve 3-5micron emission. Direct diode pumped systems [2], [3] and Tm: Fiber Laser pumped systems[4] have demonstrated hi slope efficiencies, some approaching the theoretical limit.

Basic Properties

Ho3+ concentration range

0.005 - 100 atomic %

Emission Wavelength

2.01 um

Laser Transition

5I7 → 5I8

Flouresence Lifetime

8.5 ms

Pump Wavelength

1.9 um

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


dn/dT (Thermal Coefficient of Refractive Index) @ 1064nm

7.8 10-6 K-1

Molecular Weight

593.7 g mol-1

Melting Point



4.56 g cm-3

MOHS Hardness


Young’s Modulus

335 Gpa

Tensile Strength

2 Gpa

Crystal Structure


Standard Orientation

Y3+ Site Symmetry


Lattice Constant

a=12.013 Å


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