ORC
(Reference Cavity in Vacuum)
Optical Reference Cavity in Vacuum Housing
The Optical Reference Cavity (ORC) series is our solution when customization is pivotal.
Choose from the exceptional portfolio of adaptations, auxiliary instruments and services and profit from our experience in designing generations of ultrastable laser systems.
The ORC family are Fabry-Pérot-type cavities with a resonator spacer made out of ultralow expansion glass (ULE).
The cavity is mounted in a sealed vacuum housing, engineered for exceptional temperature stability to enable low frequency drift.
The compact design ensures minimal spatial demand.
It is based on a rigidly mounted cubic spacer licensed from National Physical Laboratory.
The ORC-Cylindric uses a cylindric spacer designed by the Physikalisch Technische Bundesanstalt, that is horizontally mounted on four support points.
Here, portability is ensured by a mechanical locking mechanism.
A broad variety of add-ons and options is available for customization.
The highly reflective coatings are available over a broad wavelength range and also as dual or triple highly reflective mirrors.
Modules for input coupling, PDH locking, and output monitoring can be rigidly mounted onto the chamber, rendering tedious realignments after transportation obsolete.
Every system is baked-out during the assembly process.
The built-in NTC and Peltier elements are accessible via vacuum feedthroughs, allowing for operation at the zero crossing of the coefficient of thermal expansion (CTE).
Characterization of the CTE is available on request. Both cavities are also available without enclosure.
Key Specifications
- - 5 cm Cubic or 12 cm Cylindric ULE Spacer
- - Wavelength 650–1750 nm
- - Ion-getter Pump and Controller
Features
- Ultrastable Reference
- - Compact Footprint
- - Modular Customization
Applications
- - Laser Frequency Stabilization
- - Quantum Computing
- - Laser Cooling and Trapping
- - High Resolution Spectroscopy
Options
- - ORC-OPTIC-CUB / ORC-OPTIC-CYL
- Optics Module for Input Coupling, PDH Locking, and Monitoring
- - ORC-OPTIC-DUAL
- Complementary Optics Module (2nd wavelength) for Input Coupling, PDH Locking, and Monitoring
- - ORC-MWL
- ORC Mirror Coatings for Multiple Wavelengths Package
- - ORC-TEC
- TEC Driver
- - ORC-PDH-Optics
- PDH Optics
- - ORC-SYNCRO
- Pound-Drever-Hall Servo Electronics Package with TEC controller
- - ORC-SYNCRO-RLD
- Pound-DreverHall Servo Electronics Package with TEC controller and 1542 / 1550 nm Laser Module
- - ORC-CTE
- Characterization of the Zero-Crossing Temperature
Specifications
ORC-Cubic | ORC-Cylindric | |
| Wavelength | 650 – 1750 nm | 650 – 1750 nm |
| Finesse | Low / Mid / High | Low / Mid / High |
| Cavity Length | 5 cm | 12.1 cm |
| Free Spectral Range | 3 GHz | 1.24 GHz |
| Windows | AR Coated, Angled and Wedged | AR Coated, Angled and Wedged |
| Thermal Shields | Active and Passive | Active |
| Linear Drift Rate | ~ 150 mHz/s | ~ 150 mHz/s |
| Ambient Temperature Sensitivity | ~ 4 mK/°C | ~ 4 mK/°C |
| Temperature Sensor | 10 kΩ NTC | 10 kΩ NTC |
| Peltier Elements | 2 x 25 W | 1 x 56 W |
| Ion Getter Pump | 5 l/s | 10 l/s |
| Achievable Pressure | < 10⁻⁷ mbar | < 10⁻⁷ mbar |
| Stainless Steel Valve | Cu Sealed, KF Flange | Cu Sealed, CF Flange |
| Dimensions | W 28 cm, L 28 cm, H 18 cm | W 48 cm, L 35 cm, H 35 cm |
| Vacuum Chamber Material | Aluminum | Stainless Steel |
| Mass | 15 kg | 55 kg |
| Rack Integration | n.a. | n.a. |
| Theoretical thermal noise ADEV limit | 1.4 x 10⁻¹⁵ | 5.8 x 10⁻¹⁶ |
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