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CTH:YAG Laser Crystal for Medical Lasers

Category： Laser Crystal
Material:Cr:Tm:Ho:YAG
Color:Green
Surface Quality:10/5
Transmittance:≥99.5% @ 2080 nm (after AR coating)
Product description：CTH:YAG (Cr:Tm:Ho:YAG) laser crystal is a core gain medium for 2.1μm eye-safe wavelength medical lasers. It features efficient room-temperature operation and excellent thermal stability, precisely emp
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CTH:YAG Laser Crystal for Medical Lasers
Detailed Material Introduction
This product is fabricated with yttrium aluminum garnet (YAG) as the matrix, co-doped with three active ions (Cr³⁺, Tm³⁺, Ho³⁺), and grown by the Czochralski method. Through efficient Cr→Tm→Ho energy transfer, it stably emits 2080-2130nm laser, which is strongly absorbed by water and human soft tissues, ensuring controllable thermal damage range. With high optical uniformity, low scattering loss, and no obvious bubbles or dislocations, the crystal operates stably at room temperature without deep cooling, meeting the miniaturization and high-reliability requirements of medical laser equipment, and serving as a high-quality core material for minimally invasive medical laser systems.

Product Parameters

Parameter Name	Technical Specification
Emission Wavelength	2080-2130nm (peak at 2080nm)
Doping Concentration (Atomic%)	Cr≈0.85%, Tm≈5.9%, Ho=0.3-0.4%
Crystal Orientation	<111>, deviation ≤±5°
Transmittance (After AR Coating)	≥99.5% (@2080nm)
Surface Quality	10/5 (Scratch/Dig, compliant with MIL-PRF-13830B)
Operating Temperature	Stable operation at room temperature (20℃)
Dimensional Specification (Rod)	Diameter 3-10mm, Length 30-150mm (Customizable)

Advantages
•Eye-Safe: 2.1μm wavelength eliminates eye damage risk, ensuring safer diagnosis and treatment operations
•Efficient at Room Temperature: No deep cooling equipment required, reducing the size and cost of medical devices
•Precise & Controllable: Small thermal damage range, suitable for minimally invasive surgical needs
•Stable & Durable: Excellent optical and thermal stability, with no performance degradation during long-term operation
•High Compatibility: Adaptable to LD/flashlamp pumping, matching various medical laser equipment

Application
•Urology: Laser lithotripsy (kidney, ureteral, gallbladder stones)
•Otolaryngology: Precise treatment of nasal polyps, tonsillitis, etc.
•Dermatology: Scar repair, skin rejuvenation, vascular lesion treatment
•Dentistry: Periodontal disease treatment, tooth preparation, pulpitis diagnosis
•Minimally Invasive Surgery: Precise ablation and coagulation of various soft tissues

Customized size service

Adopting the Czochralski method for precise crystal growth, with full-process temperature and noise control to ensure crystal integrity; undergoing X-ray orientation, precision cutting, grinding and polishing to guarantee orientation accuracy and surface quality; custom anti-reflection coating on end faces to reduce reflection loss; full-process dark-field inspection and spectral verification to eliminate defective products from leaving the factory.