Sapphire ultra-stable cavity (circular cavity)
Our sapphire ultra-stable cavity (round cavity) is a high-end core component developed for the cutting-edge precision optics field. It is entirely made of sapphire material, with excellent structural stability and superior optical performance. Dimensional tolerances are precisely controlled, and optical indicators are strictly met. It perfectly meets the extreme application requirements of high-end scenarios such as ultra-stable lasers, quantum technology, gravitational wave detection, etc. We provide high stability and high precision core support for all kinds of cutting-edge optical systems.
Core Product Parameters
Screening metrics | Specific parameters |
External dimensions | D=φ10-100mm, L=5-200mm (tolerance ±0.1) |
Long through hole diameter | D = from 4 to 12 |
Parallelism of the working surface | 10 or less" |
Work surface shape | Better than λ/ [email protected] nm |
Workspace defects | Better than 40-20 |
Base material | Sapphire |
Core advantages of the product
High-end single crystal substrate:
Made entirely of sapphire material, it has an extremely low coefficient of thermal expansion, is resistant to high temperatures and laser damage, and has ultra-stable structural and optical properties that can adapt to complex and harsh working conditions.
Precise size control: Shape dimension tolerance strictly controlled ±0.1mm, strong adaptability to long through-hole specifications, high dimensional accuracy, direct integration and assembly, improving the efficiency of customer system construction.
Ultimate optical accuracy:
Working surface parallelism ≤10 ", surface shape better than λ/[email protected], working area defect better than 40-20, excellent optical surface quality, significantly reduced light transmission loss, ensuring system operation accuracy.
Wide specification coverage:
Shape diameter φ10-100mm, length 5-200mm, wide specification coverage, can match the assembly requirements of different advanced optical systems, and supports customized adaptation.
Multi-scenario compatibility:
Custom-developed for cutting-edge fields such as ultra-stable lasers, time-frequency transfer, quantum technology, and gravitational wave detection, performance indicators are in line with industry high-end standards, strong compatibility.
Core application areas
The core is applied in cutting-edge precision optics and quantum technology fields such as ultra-stable lasers, time-frequency transfer, quantum computing, quantu communication, quantum precision measurement, neutral/cold/Rydberg atom research, gravitational wave detection, etc. It is a key core component of all kinds of high-end optical systems.
High-quality sapphire substrate:
Unlocking ultra-stable core performance Crafted from high-purity single-crystal sapphire with exceptional optical homogeneity and mechanical stability, our Sapphire Ultra-stable Circular Cavity achieves industry-leading frequency stability down to 2×10⁻¹⁶ at one second integration. Sapphire’s unique properties at cryogenic temperatures—low thermal noise, high thermal conductivity and stable mechanical structure—make it an ideal material for ultra-stable cavity applications, outperforming traditional glass substrates in extreme environments. The circular cavity body is precision-machined from a single sapphire crystal to eliminate internal defects and stress.
A precisely circular structure design:
Optimizing stability and compatibility. Our Sapphire Ultra-stable Circular Cavity features a precision-engineered circular design with standard dimensions (diameter 50mm-100mm, length 100mm-200mm), optimized for resonance stability and cryogenic compatibility. The circular structure provides uniform stress distribution, minimizing deformation under mounting stress and vibration. An integrated vacuum port enables evacuation to levels better than 10⁻⁶Pa, eliminating air-induced refractive index fluctuations and thermal convection noise. The cavity incorporates a thermal management system that takes advantage of sapphire's high thermal conductivity to maintain a uniform temperature. with a zero-expansion temperature point tunable between 2°C-40°C to minimize cavity length drift. The circular shape also facilitates easy integration with cryogenic chambers and standard optical mounts, simplifying system assembly.
Core performance advantages:
Adapted for extremely precise scenarios
Ultraopto’s Sapphire Ultra-stable Circular Cavity features outstanding frequency stability with an Allan variance as low as 1×10⁻¹⁵, guaranteeing reliable performance for long-term experiments. The cavity demonstrates high finesse (up to 15,000) thanks to ultra-high mirror reflectivity. enabling sharp resonance peaks for precise laser locking via Pound-Drever-Hall (PDH) technology. Its cryogenic compatibility (operable at liquid helium temperatures) makes it suitable for low-temperature physics research, while low acceleration sensitivity (~2×10⁻¹⁰/g) minimizes vibration-induced noise. The cavity supports fundamental mode (TEM₀₀) operation, suppressing higher-order transverse modes and ensuring pure frequency reference signals. Long-term drift is controlled below 1Hz/day, meeting the stringent requirements of atomic clocks and fundamental physics tests.
Full-scenario application coverage:
Empowering high-end precision optics Our Sapphire Ultra-stable Circular Cavity is widely applied in cutting-edge scientific and industrial fields. In atomic clocks (Yb, Sr, Ca-based), it provides the ultra-stable frequency reference required for ultra-precise timekeeping. For fundamental physics research, it enables tests of the isotropy of light propagation at the 10⁻²⁰ level. In cryogenic laser systems, it serves as a frequency reference to lock narrow-linewidth lasers for gravitational wave detection and optical communication. The cavity also finds use in precision spectroscopy, quantum computing and aerospace optical sensors, delivering reliable ultra-stable performance in the most demanding environments.
Customized services:
Meeting personalized needs As a leading manufacturer of ultra-stable optical cavities, Ultraopto offers fully customized Sapphire Ultra-stable Circular Cavity solutions to meet your unique application requirements. Our professional R&D team can tailor key parameters including cavity dimensions (diameter 50mm-150mm, length 100mm-300mm), mirror curvature radius, operating wavelength (UV to NIR), Finesse (600 - 15,000) and compatibility with cryogenic temperature ranges. We support custom vacuum flange designs, multi-wavelength mirror coatings, and integrated thermal control systems for extreme environments. All custom cavities undergo multi-stage strict quality inspection, including cavity length measurement and frequency stability testing. reflectivity verification and cryogenic performance characterization, with a detailed quality report provided to ensure compliance with your design specifications.
Quality Assurance and Technical Support:
Your Trusted Choice Backed by advanced sapphire processing technology and a complete quality control system, Ultraopto ensures stable batch supply and consistent product quality. Our production processes adhere to international precision optical standards, with each cavity subjected to rigorous testing using laser interferometers, frequency stability analyzers and cryogenic environmental chambers. We provide professional technical consultation on cavity selection, cryogenic integration, vibration isolation and laser locking implementation, helping you achieve optimal system performance. Whether you need standard cavities for laboratory research or custom solutions for atomic clock manufacturing, Ultraopto’s Sapphire Ultra-stable Circular Cavity delivers exceptional value and reliability.
For more detailed technical parameters, product quotation information or custom design solutions for our Ultraopto Sapphire Ultra-stable Circular Cavity, please contact our professional sales and technical team through the official website, and we will provide you with efficient, personalized and professional optical solutions.
