Ultra-Stable Frequency-Locked Laser System
The Radiantis Locked Laser System is a fully integrated, turnkey solution designed to deliver ultra-stable, narrow-linewidth optical output with absolute frequency referencing.
Based on advanced wavelength conversion and locking technologies, the system provides spectrally pure emission with long-term stability, enabling demanding applications in quantum science and precision metrology.
Description
Built on Covesion's proven fiber-coupled waveguide platform, the system bridges robust telecom laser technology at 1560 nm with high-performance outputs at 780 nm through efficient frequency conversion. The laser is frequency-locked to an atomic rubidium (Rb) reference, ensuring absolute frequency accuracy while maintaining user-controlled offset tuning across a wide range. The locking architecture relies on a saturated absorption spectroscopy (SAS) reference and a dedicated control loop that preserves the output beam integrity. A digitally controlled offset mechanism also allows precise selection and adjustment of the output frequency relative to the atomic transition, enabling fine control for targeting specific energy levels.
The standard configuration provides continuous-wave output at 1560.49 nm and/or 780.246 nm, with output powers of up to 1 W depending on the wavelength. The system provides linewidths below 10 kHz, frequency stability better than 100 kHz and output power stability below 1% RMS, ensuring reliable long-term operation suitable for high-precision experiments.
Designed for ease of use, the Locked Laser System operates as a hands-free, rack-mounted unit with a compact 19" form factor. Turnkey operation, automated frequency locking, and optional fast modulation capabilities allow seamless integration into laboratory and industrial environments, making it particularly well suited for rubidium-based applications such as laser cooling, trapping, interferometry, quantum sensing, timing, and quantum computing.
Radiantis' expertise in frequency conversion and laser system integration ensures that the Locked Laser System delivers exceptional performance in a compact and reliable architecture, enabling cutting-edge research and next-generation quantum technologies.
Key Features
Rb Applications
Target market – Rb atom applications (quantum computing, sensing, timing)
Absolute Stability
Turnkey locked laser system providing absolute frequency stability of an atomic lock with accurate output frequency tuning
Telecom Heritage
Utilises Covesion fiber coupled waveguide technology to bridge gap from robust telecoms laser technology to 780nm applications
Dual Output
Dual 1560nm and 780nm output available
Fine Tuning
User controlled narrow-band frequency tuning of 780nm output
Fast Switching
Option for fast switching of output power
Specifications
| Specification | Value |
|---|---|
| Output wavelengths1 | 1560 nm & 780 nm |
| Output power | 10 mW (max) at 1560 nm 1 W (max) at 780 nm |
| Reference frequency2 | 384.22799 THz |
| Frequency offset range (from reference frequency)3 | ±12.8 GHz |
| Frequency offset slow tuning range (while maintaining lock to reference frequency)4 | 3 GHz |
| Frequency offset fast tuning range (while maintaining lock to reference frequency)5 | 350 MHz |
| Linewidth6 | <10 kHz at 780 nm |
| Frequency stability7 | <100 kHz at 780 nm |
| Power stability8 | <1% RMS |
| Modulated output (optional)9 | <100 ns |
| Output extinction ratio | 70 dB at 780 nm |
| 780 nm optical output | 2 m long PM780 nm patch cable fibre with FC/APC connector |
| 1560 nm optical output | Chassis mount FC/APC connector |
| Form factor | 19" rack mount |
1 1560 nm monitor output (optional).
2 87Rb F = 2 to F’ = 2/3 cross-over transition. Other reference locks available at customer request.
3 User-controlled offset. Option for up to 60 GHz offset.
4 0.03 MHz/ms tuning rate.
5 0.5 MHz/ms tuning rate.
6 RMS over 100 ms.
7 RMS over 12 hrs.
8 Over 12 hrs.
9 External drive signal.
Performance Charts
Locked versus unlocked frequency stability at 780 nm.
Output power stability at 780 nm.
Linewidth at 780 nm.
Models
Locked Laser System
Tuning range
Output wavelength: 1560 nm and/or 780 nm
Reference frequency: 384.22799 THz
Frequency offset: ±24 kHz to 12.8 GHz
Average power
Output power: up to 1 W
Linewidth: <10 kHz (RMS)
Frequency stability: <100 kHz (RMS)
Pulse duration: Continuous-Wave Integrated pump: Yes
Applications
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