ORS
(Ultrastable Laser System)
Ultrastable Optical Reference with Hz-Level Linewidth and Lowest Phase Noise
The Optical Reference System (ORS) is designed for uncompromised performance. It delivers ultra-narrow linewidth laser light with outstanding frequency stability.
The system’s centerpiece is a high-finesse Fabry-Pérot cavity (cylindric spacer with a length of 12.1 cm) serving as a reference for a CW laser.
The cavity is made out of ultra-low expansion glass (ULE) and is operated in vacuum at the point of zero thermal expansion.
The reference cavity is actively decoupled from vibrations and acoustically isolated allowing for ultimate performance also in rough laboratory environments.
An easy-to-use cavity-locking mechanism ensures portability without realignment of the optical paths.
The system is operated by the newest generation of Menlo Systems’ proprietary SYNCRO controller—a modular electronics platform designed for versatility and intuitive use.
It incorporates all required electronics, e.g., a low-noise laser driver and a very fast (analog) servo loop for laser frequency stabilization.
The user controls all parameters using either the 7” front-panel touchscreen or a GUI on a remote PC. The onboard software ensures automatic cavity locking and system monitoring.
Features
- Top Performance
- Ultimate Stability
- Automated Locking
- Customizable Design
- Transportable System
- Compact Integration
Key Specifications
- Stability <7 x 10-16 at 1 s (ORS with ORS-FS-XTAL Option)
- Linewidth <1 Hz
- Output Power >10 mW
- Wavelength 650–1600 nm (ORS) 900–1600 nm (with ORS-FS-XTAL)
Applications
- Optical Clocks
- Quantum Computing
- Ultra-low Noise Microwave Generation
- Frequency Comb Stabilization
- High Resolution Spectroscopy
- Laser Cooling and Trapping
Options
- ORS-FS-XTAL:
Crystalline Mirror Coating
- ORS-EOM-SBL:
EOM Sideband Lock
- ORS-FNC:
Fiber Noise Cancellation
- ORS-MWL:
Multiple-Wavelengths Mirror Coatings
- ORS-SHG:
Second Harmonic Generation
- ORS-HP:
High Output Power
- ORS-DDRIF:
Cavity De-drifting
- ORS-DSRV:
Digital Servo Interface for Stabilisation to External Atomic Transition
Specifications
| Wavelength | 650–1600 nm (ORS), 900–1600 nm (ORS with ORS-FS-XTAL) |
| Stability (MADEV at 1 s, Linear Drift Removed) | <7 x 10-16 (ORS with FS-XTAL Option) <1 x 10-15 (ORS with ULE-IBS) |
| Linewidth | <1 Hz |
Phase Noise (at 1542 nm*, Laser Source Dependent)
*Scaling accordingly for different carrier frequencies | ORS ORS with ORS-FS-XTAL at 1 Hz -7 dBc/Hz -10 dBc/Hz at 10 Hz -27 dBc/Hz -30 dBc/Hz at 100 Hz -45 dBc/Hz -47 dBc/Hz at 1000 Hz -70 dBc/Hz -70 dBc/Hz
For all models spurious signals <-20 dBc |
| Output Power | >10 mW (FC/APC Connector), High Power on Request |
| Cavity Spacer | 12.1 cm, ULE, Cylindric Design |
| Free Spectral Range | 1.24 GHz |
| Linear Drift Rate | approx. 150 mHz/s after 12 months |
| Vibration Isolation Platform | included |
| System Dimensions / Weight | 590 x 800 x 1550 mm (29U) / 260 kg |
Requirements
| Operating Voltage | 100 / 115 / 230 VAC |
| Line Frequency | 50 to 60 Hz |
| Operating Temperature | 22 ± 5 °C |
| Power Consumption | <150 W |
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