Cr,Tm,Ho:YAG
Our Cr,Tm,Ho:YAG is an efficient xenon-lamp- or diode-pumped laser crystal with good overall performance. Its wavelength is 2.1μm. Pump energy mainly comes from flashlamp energy absorbed by Cr³⁺. Ho³⁺ is the active ion, while Tm³⁺ serves as an energy-transfer intermediary. Laser light at 2.1μm is well absorbed by water, readily transmitted through the atmosphere, and eye-safe. Laser light at 2.1μm is also an ideal pump source for 3-5μm mid-infrared optical parametric oscillators. CrTmHoYAG has a broad absorption band, high slope efficiency, compatibility with flashlamp or diode pumping, good room-temperature operation, and operation in a relatively eye-safe wavelength range. It is therefore widely used in medicine, lidar, and military applications.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Doping concentration | Ho:0.3~0.4at% Cr:0.3~1.2at% Tm:5~6at% |
| Wavefront distortion [@632nm] | <λ/4@632nm |
| Extinction ratio | ≥25 dB |
| Dimensions | Diameter :3~6mm, Length :50~120mm |
| Dimensional tolerance | Diameter :+0.00/-0.05mm, Length : ± 0.5mm |
| Precision grinding | 50-80 microinches (RMS) |
| Parallelism | ≤30″ |
| Perpendicularity | ≤5′ |
| Flatness [@633 nm] | λ/10@ 633 nm |
| Surface Quality | 10/5 Scratch / Digper MIL-O-1380A |
| Chamfer | 0.006″±0.002″ at 45°± 5° |
| High-transmission coating reflectance [@2094nm)] | ≤ 0.25% (@2094nm) |
| Structure | Cubic |
| Lattice constant | 12.01Å |
| Melting point | 1970°C |
| Density | 4.56g/cm³ |
| Orientation | Within 5° of <111> or <100]> in the crystal |
| Thermal expansion | 7.8×10⁻⁶ /K |
| Thermal conductivity | 14W/m/K, 20°C；10.5W/m/K, 100°C |
| Mohs hardness | 8.5 |
| Dielectric constant | 11.7 |
| Laser transition | ⁵I₇ → ⁵I₈ |
| Laser Wavelength | 2.094 µm |
| Photon energy | 9.55 x 10^–²⁰ J |
| Fluorescence lifetime | 8.5 ms |
| Refractive Index [@2.08 µm] | 1.80 @2.08 µm |
| Aperture | >90% |
| Absorption Linewidth | 4 nm |
| Diode pumping band | 781 nm |
| Main pumping band | 400~800 nm |
Key Features
Datasheet
Supplier Information
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