Sapphire Super Stable Cavity-Circular Cavity | Ultra-Stable Frequency Stabilization Solutions
Engineered for precision that defies environmental chaos, the Sapphire Super Stable Cavity-Circular Cavity redefines stability in optical systems. Designed to thrive in quantum computing, gravitational wave detection, and high-power laser applications, this cavity combines single-crystal sapphire’s near-zero thermal expansion with circular geometry optimized for stress distribution. Whether you’re stabilizing frequency combs or enhancing optical clocks, its sub-nanometer surface finish and military-grade durability deliver unmatched performance where even micron-level errors matter.
Why Choose Our Sapphire Super Stable Cavity?
Unmatched Thermal & Mechanical Stability
- Near-Zero Thermal Expansion: CTE < 1×10⁻⁸/K ensures stability from cryogenic (-50°C) to high-temperature (120°C) environments.
- Vibration Resistance: <1 nm displacement under operational loads, even in industrial settings.
- Decades-Long Durability: Proprietary stress-relief protocols reduce dimensional drift to <0.1 ppm/year.
Precision You Can Trust
- Surface roughness <0.1 nm RMS minimizes light scattering.
- Diameter tolerance ±0.5 μm for perfect beam alignment.
- Custom coatings (99.999% reflectivity @632–1550 nm) tailored to your wavelength.
Built for Your Challenges
- Integrates seamlessly with piezoelectric tuners and thermal control systems.
- Pre-certified for ISO 9013, MIL-STD-810H, and medical CE standards.
Parameters
| Parameter |
Specification |
| Dimension |
D=φ10-100mm, L=5-200mm (tolerance ±0.1) |
| Long through hole diameter |
D=φ5m-φ30mm |
| Working surface parallel |
S1∥S2≤10" |
| Working surface accuracy |
Better than λ/8 |
| Working area defect |
Better than 40/20 |
| Material |
Sapphire |
Note: We offer customization options to meet your specific requirements.

Technical Specifications
- Material: Synthetic sapphire (Grade A): Boasts exceptional hardness (9 Mohs) and chemical inertness, resisting scratches, corrosion, and wear in high-stakes applications like medical devices, aerospace sensors, and industrial lasers. Its optical clarity across 200nm–5μm makes it ideal for UV to mid-IR systems, outperforming glass in harsh environments where durability and precision are critical, from surgical equipment to deep-space probes.
- Dimensions: Ø10–100 mm (±0.1 mm), customizable: Offers tight tolerance manufacturing for seamless integration into optical assemblies, with custom sizes available for specialized setups like fiber optic connectors or laser cavities. The ±0.1mm precision ensures consistent fit in mass-produced devices while accommodating unique designs, making it versatile for both standard and bespoke applications in telecom, defense, and research.
- Surface Quality: λ/8 flatness, <40/20 scratches-dig: Delivers superior optical performance with minimal light scatter, essential for high-resolution imaging systems, spectroscopy, and laser beam delivery. The strict scratch-dig standards ensure reliability in critical applications like semiconductor inspection or satellite optics, where surface imperfections could distort data or reduce system efficiency.
- Thermal Range: -50°C to 120°C (expandable to 500K): Maintains stability across extreme temperatures, suitable for outdoor sensors, automotive optics, and industrial furnaces. Its ability to withstand thermal cycling without warping makes it ideal for environments with rapid temperature shifts, ensuring consistent performance in military deployments, oil rig instrumentation, or aerospace thermal management systems.
- Coating Options: HR, AR, or dual-band (700–1600 nm): Enhance functionality with high-reflectivity (HR) coatings for laser cavities, anti-reflective (AR) for maximum light transmission in imaging, or dual-band for multispectral systems. These coatings are optimized for durability, retaining performance over time in harsh conditions, making them perfect for surveillance cameras, lidar systems, and optical communication networks.
How We Outperform Competitors
Our Sapphire Super Stable Cavity-Circular Cavity uses a patented multi-layer thermal compensation architecture, proven in EUV lithography systems to achieve 10⁻¹⁶ frequency stability. Unlike fused silica alternatives, our cavities maintain <1 ppm/K stability without active cooling—reducing your system complexity by 40%.
Certifications & Compliance
- ISO 17025-certified metrology lab
- ITAR-registered for U.S. defense projects
- RoHS/REACH compliant for global shipments

Customize Your Cavity
Need a non-standard solution? We offer:
- Mounting Interfaces: Invar, Zerodur, or custom alloys.
- Coatings: Ion-beam sputtered (IBS) for extreme durability.
- Packaging: Vacuum-sealed or convection-cooled designs.
Case Study: Precision in Action
A leading semiconductor manufacturer achieved 30% yield improvement in 3 nm chip production using our cavities for laser stabilization. [Request redacted case study for details.]
Frequently Asked Questions
Q: How does the circular design improve performance?
A: The Sapphire Super Stable Cavity-Circular Cavity evenly distributes mechanical stress, reducing diffraction losses by 60% compared to linear designs.
Q: Can these cavities withstand high humidity?
A: Yes—our sapphire polishing process includes hydrophobic coatings to prevent moisture absorption.
Q: What’s the lead time for custom orders?
A: 8 weeks standard, with expedited 4-week options for urgent projects.
Need a cavity that keeps up with your ambitions?
Email xachaona@163.com for your free stability simulation report or bulk pricing quote about Sapphire Super Stable Cavity-Circular Cavity.
Supported by 24/7 technical support and a 5-year performance warranty.