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¡¡Products / Laser Crystals

Ho:Cr:Tm:YAG


Ho:Cr:Tm:YAG is a high efficiency laser material whichlasers at 2.1¦Ìm. It has wide applications in medical,military and meteorology fields.
Advantages of Ho:Cr:Tm:YAG Crystal includes:
High slope efficiency;
May be flash lamp or diode pumped;
Operates well at room temperature;
Operates in a relatively eye-safe wavelength range.
1. Material and Specifications

 Dopant Concentration:

 Ho:¡«0.35 at%, Tm:¡«5.8 at%,Cr:~1.5at%

 Orientation:

 [111] within 5¡ã

 Wavefront Distortion:

 ¡ÜLambda/8 @632.8nm

 Extinction Ratio:

 ¡Ý28 dB

 Rod Sizes:

 Upon request of customer

 Dimensional Tolerances:

 Diameter:+0.00/-0.05mm,
 Length: ¡À 0.5mm

 Barrel Finish:

 Ground Finish: 400# Grit

 Parallelism:

 ¡Ü15" Arc Second

 Perpendicularity:

 ¡Ü5¡ä Arc Minute

 Flatness:

 ¡ÜLambda/10 @632.8nm

 Surface Quality:

 10/5 Scratch/Dig. (per MIL-O-13830A)

 AR Coating Reflectivity:

 ¡Ü0.25% (@2094nm)

2. Optical and Spectral Properties

 Laser Transition:

 5I7 - 5I8

 Laser Wavelength:

 2.097 ¦Ìm

 Photon Energy:

 9.55 x 10-20 J

 Emission Cross Section:

 7 x 10-21 cm2

 Fluorescence Lifetime:

 8.5 ms

 Index of Refraction:

 1.80 @2.08 ¦Ìm

 Absorption Linewidth:

 4 nm

 Diode Pump Band:

 781 nm

 Major Pump Bands:

 400~800 nm

3.Physical and Chemical Properties

 Crystal Structure

 Cubic

 Lattice Parameters

 12.01Å

 Melting Point

 1970¡æ

 Moh Hardness

 8.5

 Density

 4.56¡À0.04g/cm3

 Specific Heat (0-20)

 0.59J/g.cm3

 Modulus of Elasticity

 310GPa

 Young's Modulus

 3.17¡Á104Kg/mm2

 Poisson Ratio

 0.3(est.)

 Tensile Strength

 0.13~0.26GPa

 Thermal Expansion Coefficient

 [100]Direction:8.2¡Á10-6/¡æ(0~250¡æ)

 [110]Direction:7.7¡Á10-6/¡æ(0~250¡æ)

 [111]Direction:7.8¡Á10-6/¡æ(0~250¡æ)

 Thermal Conductivity

 14W/m/K(@20¡æ)

 10.5W/m/K(@100¡æ)

 Thermal Optical Coefficient (dn/dT)

 7.3¡Á10-6/¡æ

 Thermal Shock Resistance

 790W/m

 Solubility

 Water:Insoluble;
 Common Acids:Slightly