¡¡
¡¡Products / Laser Crystals

Er:YAG

 

Er:YAG is an excellent laser crystal which lasers at 2.94¦Ìm.
It has wide applications in medical laser systems.and advantages of Er:YAG including:Crystal high-slope efficiency Operate well at room temperature Operate in a relatively eye-safe wavelength range
1.Main Specifications

 Dopant concentration:

 Er:~50 at%

 Orientation:

 [111] within 5¡ã

 Wavefront Distortion:

 ¡ÜLambda/10@633nm

 Extinction Ratio:

 ¡Ý28 dB

 Rod Sizes:

  Upon request of customer

 Dimensional Tolerances:

 Diameter:+0.0mm/-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% (@2940nm)

2. Optical and Spectral Properties

 Laser Transition:

  4I11/2 to 4I13/2

 Laser Wavelength:

 2940nm

 Photon Energy:

 6.75¡Á10-20J(@2940nm)

 Emission Cross Section:

 3¡Á10-20 cm2

 Index of Refraction:

 1.79@2940nm

 Pump Bands:

 600~800nm

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