CTH:YAG Crystal

CTH:YAG Crystal is a high-efficiency laser material emitting at a wavelength of 2.1 μm. It finds wide applications in medical, military, and meteorological fields. Suitable for both lamp pumping and laser diode pumping, it boasts high slope efficiency, operates at room temperature, and features a laser working wavelength that is relatively safe for human eyes.

Main Advantages:

Wide Emission Wavelength Range: CTH:YAG crystal can emit laser radiation across a broad wavelength range, which allows for flexibility in applications and the ability to choose the optimal wavelength for specific tasks.

High Efficiency: The combination of dopants in CTH:YAG crystals results in high laser conversion efficiency, meaning that a higher percentage of the pump energy is converted into laser light.

High Damage Threshold: These crystals can withstand high-intensity laser radiation without suffering damage, making them suitable for high-power laser systems where peak powers can be very high.

Thermal Stability: CTH:YAG crystal maintain their performance characteristics over a wide range of temperatures, which is crucial for laser systems that may be operated in environments with significant temperature variations.

Good Optical Quality: The crystals have high transparency and good optical uniformity, which are essential for the production of high-quality laser beams.

Long Lifespan: The longevity of CTH:YAG crystals means that they can operate for extended periods without degradation, reducing the need for frequent replacement and thereby increasing the lifespan of the laser system.

Synergistic Effects of Dopants: The presence of chromium, titanium, and holmium together in the crystal creates synergistic effects that can enhance the laser performance, such as improving the gain and reducing the threshold for laser action.

Ease of Operation and Integration: CTH:YAG crystals are relatively easy to handle and integrate into laser systems, making them user-friendly for laser engineers and researchers.

Applications:

Medical Applications: CTH:YAG crystals are used in medical procedures, particularly in laser surgery and treatments requiring precise tissue ablation or coagulation at the 2.1 μm wavelength. They are effective in procedures such as lithotripsy (breaking kidney stones), as well as in dermatology for skin treatments.

Military Applications: In the military sector, CTH:YAG crystals are utilized for laser designators and rangefinders due to their ability to emit in the eye-safe 2.1 μm range. They are also used in target designation and laser guidance systems.

Meteorological Applications: CTH:YAG crystals play a role in atmospheric research and remote sensing. They are used in lidar (Light Detection and Ranging) systems for studying atmospheric composition, wind patterns, and aerosol content. Their wavelength is suitable for probing the atmosphere with high precision.

Industrial and Scientific Applications: These crystals are employed in industrial applications such as laser material processing, where the 2.1 μm wavelength is advantageous for processing materials that are highly absorbing at this wavelength. They are also used in spectroscopy and other scientific research applications due to their precise wavelength emission and reliability.

Specifications

Crystal Structure	Cubic system
Concentration	Ho:0.3～0.4at% Cr:0.3～1.2at% Tm:5～6at%
Orientation	<111>±5°
Wavefront Distortion	≤0.125λ/inch
Extinction Ratio	≥25dB
Density	4.56±0.04 g/ cm3
Moh’s hardness	8.5
Sizes	Ø≤15mm, L≤150 mm
Tolerances	Ø:0/-0.03mm, L:0/+0.5mm
Cylindrical machining	Grinding, Polishing, Grooving
Parallelism	≤ 10″
Perpendicularity	≤ 5′
Flatness	λ/10 @632.8nm
Surface Quality	10-5 (MIL-O-13830A)
Chamfer	0.15±0.05mm
Coating	S1/S2:R≤0.2%@2100mm
	Other coating can be customized
Laser wavelength	2100nm
Refractive index	1.80@2100nm
Special specifications	Concave /Convex on end faces