JGS1 Quartz Glass: Ultra-High Purity Synthetic Fused Silica

JGS1 quartz glass is a premium synthetic fused silica produced using SiCl₄ as the raw material and melted with a high-purity hydrogen–oxygen flame. This process yields exceptional optical and structural purity, making JGS1 one of the highest-performing quartz materials available for precision optical and scientific applications.

Key Properties

• High Hydroxyl Content: Contains approximately 2000 ppm of hydroxyl (OH) groups, providing excellent UV transparency.
• Superior UV Transmission: Outstanding performance in short-wave UV; transmittance at 185 nm can reach 90% or higher.
• Absorption Peak: Exhibits a characteristic absorption at 2730 nm.
• Structure: Homogeneous, non-crystalline structure with no grain boundaries — ensures consistent optical behaviour.
• Material Form: Flame-fused, synthetic, bubble-free silica for precision optical work.

Optical Characteristics

• Optimised for deep-UV and visible wavelength ranges.
• Exhibits low birefringence and minimal absorption across 200–2500 nm.
• Exceptional surface polish capability for optical and laser applications.

Applications

• Laser Systems: Deep-UV optics, laser cavity components, and beam windows.
• Lenses & Optical Elements: High-transmission UV/visible lenses and prisms.
• Windows & Mirrors: Precision optical windows and reflective substrates.
• Scientific Instruments: Spectroscopy, lithography, and measurement systems.

Equivalent Materials

The following materials are considered equivalent to JGS1 synthetic quartz silica, offering similar purity and optical transmission characteristics:

• Heraeus: Suprasil 1 and 2
• Saint-Gobain: Spectrosil A and B
• Corning: 7980
• Dynasil: 1100 and 4100

These brands share comparable properties — namely high purity, superior UV transmittance, and outstanding structural homogeneity — making them suitable substitutes depending on project specifications and supply preference.

John Moncrieff Ltd offers full machining, polishing, and component fabrication from JGS1 and its equivalent grades, supporting both research-grade and industrial-scale optical applications.