When your research or industrial application demands uncompromising thermal and mechanical stability, the Zerodur Super Stable Cavity-Circular Cavity delivers. Crafted from Schott Zerodur®—a glass-ceramic material with a near-zero coefficient of thermal expansion (CTE)—this cavity maintains nanometer-level dimensional accuracy even in cryogenic environments or under intense temperature fluctuations. Whether you’re stabilizing lasers for atomic clocks, enabling quantum communication networks, or detecting gravitational waves, the circular design minimizes stress-induced distortions while ensuring ultra-low optical loss. Trusted by institutions like NIST and ESA, our cavities are engineered for mission-critical precision.
Unmatched Thermal Stability Zerodur®’s CTE of <0.05 ppb/K ensures your Zerodur Super Stable Cavity-Circular Cavity’s dimensions remain stable across temperatures ranging from -100°C to 150°C—critical for atomic clocks or space-based optics. This ultra-low expansion eliminates thermal drift that would corrupt frequency references in precision timekeeping, while withstanding the extreme temperature swings of LEO/MEO orbits, ensuring consistent performance in satellite laser ranging and quantum communication systems without frequent recalibration.
Stress-Optimized Circular Geometry: Unlike linear designs, the circular shape distributes mechanical and thermal loads evenly, reducing deformation risks and enhancing resonance mode purity. This structural advantage is vital for high-finesse cavities in quantum computing and gravitational wave detectors, where mode distortion would compromise qubit readout accuracy or signal detection sensitivity, ensuring stable operation under vibration, shock, or thermal cycling.
Sub-Nanometer Surface Precision: Advanced polishing achieves surface roughness <0.5 nm RMS, minimizing scattering losses and maximizing reflectivity for high-power laser systems. This level of precision preserves beam quality in 10kW+ laser setups, from industrial cutting tools to defense-directed energy weapons, while reducing noise in LIGO-grade interferometers, where even minor surface irregularities would obscure faint gravitational wave signals.
Tailored to Your Needs: Customize diameters (10–300 mm), coatings (e.g., 99.999% HR at 1064 nm), and mounting interfaces to integrate seamlessly with your setup. Whether adapting to compact atomic clock enclosures, large telescope arrays, or specialized sensor housings, this flexibility ensures optimal performance—from maximizing reflectivity in laser cavities to ensuring thermal compatibility in cryogenic quantum labs.
| Parameter | Specification |
|---|---|
| Dimensions | D: φ10-100mm, L: 5-200mm (±0.1mm tolerance) |
| Through Hole Diameter | D=φ5mm-φ30mm (tolerance ±0.1) |
| Working Surface Parallel | S1∥S2≤10" |
| Surface Accuracy | Better than λ/8 |
| Working Area Defect | Better than 40/20 |
| Material | Zerodur |
Note: Custom specifications available upon request.

Atomic Clocks
Our cavities are integral to next-generation optical lattice clocks, achieving frequency stabilities of 10⁻¹⁸.
Quantum Computing
Enable long coherence times in quantum memory systems with cryogenic-ready designs.
Gravitational Wave Detection
Deployed in seismic noise mitigation setups, our cavities ensure sub-picometer displacement sensitivity.

Q1: How does the circular design improve stability over linear cavities?
The symmetrical geometry reduces stress concentration points, ensuring uniform thermal response and minimizing vibration-induced noise.
Q2: Can I integrate this cavity into an existing UHV system?
Yes! We offer CF flanges, Kovar seals, and bakeable coatings for seamless UHV integration.
Q3: What validation data is available for long-term performance?
We provide FEM simulation reports and accelerated aging tests showing <5 nm dimensional drift over 10 years.
Q4: Do you support active temperature compensation?
Absolutely. Our cavities can incorporate embedded sensors for real-time thermal feedback systems.
Q5: How are cavities protected during shipping?
Each unit is shipped in a vibration-damped, temperature-controlled crate with real-time GPS tracking.
Zerodur Super Stable Cavity-Circular Cavity: Where groundbreaking research begins. Let’s build your precision future together.
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