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Home > Laser Crystals and Components > CO2 Laser Optics > CTH:YAG Crystals
  • CTH:YAG Crystals
  • CTH:YAG Crystals

CTH:YAG Crystals

  • Eye-safe wavelength of 2.1 μm
  • High slope efficiency
  • Excellent operation at room temperature
  • Pumping source options: flash lamp or laser diode
  • Ideal for medical lasers, laser cutting and welding, and scientific research applications.
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Specifications:

Cr Concentration 0.85% Tm Concentration 5.90%
Ho Concentration 0.36% Wavefront Distortion (Per inch of rod length) <I/2
End Face Parallelism <10 arc seconds

 

Physical and Optical Properties:

Crystal Structure Cubic Lattice Parameters 12.01 Å
Melting Point 1970℃ Moh Hardness 8.5
Density 4.56g/cm3 Specific Heat (0-20) 0.59J/g.cm3
Modulus of Elasticity 310GPa Poisson Ratio 0.3(est.)
Tensile Strength 0.13~0.26GPa Thermal Expansion Coefficient [100]Direction:8.2x10-6 /°C(0~250℃)
[110]Direction:7.7x10-6 /°C(0~250℃)
[111]Direction:7.8x10-6 /°C(0~250℃)
Thermal Conductivity 14W/m/K(@20℃)
10.5W/m/K(@100℃) 		Thermal Optical Coefficient (dn/dT) 7.3x10-6 /C°
Thermal Shock Resistance 790W/m Solubility Water: Insoluble;
Common Acids: Slightly
Laser Transition 5I7 - 5I8 Laser Wavelength 2.097μm
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 @2.08μm
Absorption Linewidth 4nm Pump Wavelength 781nm
Major Pump Bands 400~800nm

Cr:Tm:Ho:YAG, CTH:YAG is a kind of excellent laser crystal emitting at 2.1um wavelength. The addition of cerium as a dopant in the YAG crystal matrix enhances certain performance aspects. Due to its advantages including high slope efficiency, fitness for operation at room temperature, and output eye-safe wavelength laser light, CTH: YAG crystals find widespread applications in various laser systems, including solid-state lasers used in medical procedures (such as dermatology and ophthalmology), laser cutting and welding, and scientific research applications. Hangzhou Shalom EO offers the CTH:YAG rods tailored upon customers' request.

The Advantages of CTH: YAG 

  • High Thermal Conductivity: CTH: YAG crystals exhibit high thermal conductivity, which means they can dissipate heat effectively during laser operation. 
  • Wide Transparency Range: CTH: YAG crystals have a wide transparency range, allowing them to operate over a broad spectrum of wavelengths.
  • Excellent Optical Properties: These crystals possess excellent optical properties, such as high optical homogeneity and low scattering, which contribute to the quality of the laser beam.
  • Chemical and Mechanical Stability: CTH: YAG crystals are chemically and mechanically stable, making them durable and resistant to environmental factors. 
  • High Damage Threshold: These crystals typically have a high damage threshold, meaning they can withstand high-power laser radiation without significant damage. This is crucial for applications requiring intense laser beams.
  • Efficient Energy Conversion: CTH: YAG crystals are known for their efficient energy conversion, enabling the production of high-quality laser beams with minimal energy losses.

Application Notes:

  • Surgery
  • Dentistry
  • Atmospheric Testing


Laser Crystal Comparison Chart:

laser crystal comparison