Arsuf Lasers’ reliable product
When coming to sourcing a CTH: YAG laser rod for your eye-safe 2.1 μm application, there is one major parameter to consider.
There is a great variation in slope efficiency offered by various laser rod vendors. Arsuf Lasers developed a process that requires indeed much more care and investment; however, it yields around 30% higher efficiency.
This counts much for medical systems using this rod.
A high level of polishing and our hard coating process complete the production cycle.
Arsuf Lasers supplies laser rods and also provides engineering support and failure analysis, free if needed.
Fill in the contact form and let us know about your needs.
CTH: YAG Laser Rod — Technical Specification
Purpose: Gain medium for the CTH:YAG laser system (emission wavelength ~2090 nm). Suitable for pulsed (Q-switched) operation.
1. Material & Dopant
- Material: YAG optical grade.
- Dopant Ions: Cr³⁺, Tm³⁺, Ho³⁺
- Dopant Concentration: 0.1 – 8 at%
2. Dimensions
- Shape: Cylindrical rod, end-faces flat and parallel.
- Diameter: 1-10 mm (±0.02 mm)
- Length: 10–150 mm (±0.5 mm)
- Edge Bevel: 0.75-0.125 mm x 45°
- Edge Finish: Fine grid (400 Mesh)
- Edge Chips: 0.125 mm max (not to exceed bevel diameter)
- Barrel Finish: Ra = 1.6 ±0.02 µm
- Clear Aperture: > 95%
3. End Surface Finish
- Type: Flat/Flat or Flat/Radius (e.g., 1 meter)
- Parallelism of End Faces: ≤ 5 arc sec
- Scratch-Dig: 10-5 (Side 1 & 2)
- Flatness: λ/10 @ 632.8 nm
- Perpendicularity: ≤ 5 arc minutes
- Wavefront Error: ≤ λ/16 per inch @ 632.8 nm
- Quality Standard: Per MIL-PRF-13830
4. End-Face Coatings & LDT
- Coatings: Optional AR, HR, or PR @ 2090 nm.
- Angle of Incidence (AOI): 0° (Normal)
- Coating Examples:
- AR @ 2090 nm: R ≤ 0.2% per surface
- HR @ 2090 nm: R ≥ 99.8%
- PR @ 2090 nm: R = 80-95% ±1% (Typical)
- Coating Type: IBS, IAD e-beam.
- Laser Damage Threshold (LDT): ≥ 25-40 J/cm² @ 2090 nm (10 ns pulse)
- Documentation: Coating test data and measured reflectivity/absorption curves provided with delivery.
5. Traceability, Packaging & Warranty
- Traceability: Each rod is serialized. Includes QC dimensional report (parallelism, perpendicularity, etc.) and coating test reports.
- Packaging: Vibration-damped boxes.
- Lead Time: 8 weeks (Typical)
- Warranty: 12 months against manufacturing defects.
More information about CTH: YAG crystal
Cr: Tm: Ho: YAG is a highly efficient laser crystal pumped by a Xenon lamp or diode with a wavelength of 2.1μm. The pump source originates from the flash lamp energy absorbed by Cr3+, Ho3+ is a working ion, and Tm3+ acts as an intermediary to transfer energy. A 2.1 μm laser wave can be absorbed by water very well, transmits atmosphere easily, and is safe to the eye.
Applications
It is commonly used as a laser medium in medical procedures, particularly in urology and ophthalmology, as it emits light at a wavelength of 2140 nm, which is absorbed by water, making it highly effective for cutting and vaporizing tissue. It can also be used for other applications such as material processing and spectroscopy.
Frequently Asked Questions
According to the technical specification, a detailed report is supplied to the customer.
No, as all crystals are processed on the same line, the main difference lies in the LIDT requirements (Laser Induced Damage Threshold) determined by the rod's energy density.
Replacement depends on usage, maintenance, and industry, similar to car mileage.
Arsuf is capable of selecting diverse manufacturing and coating processes to maximize crystal quality, efficiency, maximal energy output, above-average lifetime, and high damage threshold. The entire process is performed in-house, leveraging multiple supplier capabilities to ensure the highest customer satisfaction—free from the constraints of a single-supplier approach.
Product warranty is provided by Arsuf, enabling selection from multiple manufacturing and coating technologies for the best outcome.
Commitment to Quality Excellence
At Arsuf Lasers, we are proud to uphold the highest standards in quality management, as demonstrated by our ISO 9001 certification. This certification reflects our ongoing commitment to excellence, ensuring that every process we implement meets rigorous international standards. Our dedication to quality allows us to consistently deliver precise, reliable, and innovative laser solutions that meet the evolving needs of our clients.
Click the certificate image below to view our ISO 9001 certificate.
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