| Applications | ◆Mostly used in passively Q-switching diode pumped or lamp pumped passive Q-switching materials. | |||
| Features | ◇Chemical stability | |||
| ◇UV resistant | ||||
| ◇Good thermal conductivity | ||||
| ◇High damage threshold (> 500 MW/cm2） | ||||
| ◇Absorptions wavelength of 900nm--1200nm | ||||
| ◇Peak of around 1060nm with large absorption section | ||||
| Main Specification | Material | Chromium doped yttrium aluminum garnet | ||
| Cr4+ dopant concentration | 0.5 mol% ~ 3 mol% | |||
| Diameter | 2×2 ~ 14×14mm Length 0.1 ~ 12mm | |||
| Dimensional Tolerance | (W±0.1mm) × (H±0.1mm) × (L + 0.2mm/-0.1mm) | |||
| Angle tolerance | Δθ<±0.5°; Δφ< ±0.5° | |||
| Coating | AR coatings reflectivity <0.2 % @ 1064 nm | |||
| Orientation | [100]+/-10° | |||
| Initial transmission | 10% ~ 99% | |||
| Wavefront Distortion | < λ/8 @ 633nm | |||
| Surface quality Scratch/Dig | 10/5 Scracth/dig per MIL-O-13830A | |||
| Parallelism | <20 arc seconds | |||
| Perpendicularity | 5 arc min | |||
| Surface flatness | <λ/10 @ 632.8 nm | |||
| Clear aperture | > 90% central area | |||
| Chamfer | <0.1 mm × 45° | |||
| Damage Threshold | ＞500 MW/cm2 | |||
| Physical and Chemical Properties | Chemical Formula | Cr4+:Y3A15O12 | ||
| Crystal Structure | Cubic garnet | |||
| Dimensional tolerances | +0/-0.1 mm | |||
| Recovery time | 8.5μs | |||
| Density | 4.56g/cm | |||
| Mohs Hardness | 8.5 Mohs | |||
| Refractive Index | 1.82 @ 1064nm | |||
| Thermal Conductivity | 12.13w/m/kv | |||
| Optical properties | Base state absorption cross section | σs1=4.3x10-18cm2 | ||
| Emission state absorption cross section | σs2=8.2×10-19cm2 | |||
| Fluorescent Lifetime | 3.4μs | |||
