JGS2 is a high-purity synthetic fused silica glass with low hydroxyl content. It features balanced transmittance across mid-ultraviolet, visible and near-infrared bands from 220 nm to 3000 nm. With excellent thermal stability, low impurities and great optical uniformity, it is widely used for optical windows, lenses, laser parts and precision optical instruments.
Suitable for long-wavelength applications
Good laser stability
Excellent chemical stability
| Comparison Item | JGS1 | JGS2 | JGS3 |
| Material Type | Synthetic fused silica (high hydroxyl) | Synthetic fused silica (low hydroxyl) | Natural fused silica (ultra-low hydroxyl) |
| UV Transmittance | Best deep UV performance | Good mid-UV performance | Weak UV transmittance |
| Infrared Transmittance | Strong infrared absorption | Good infrared transmittance | Optimal infrared transmittance |
| Typical Transmission Band | 185nm - 2500nm | 220nm - 3000nm | 260nm - 3500nm |
| 193 / 248 nm Deep UV | Applicable (lithography / UV instruments) | Not suitable for deep UV | Not applicable |
| Laser Resistance | Conventional UV laser | Stable for UV & visible laser | Preferred for high-power infrared laser |
| Thermal Stability | Excellent | Superior | Top-tier, high temperature aging resistance |
