The Toptica DFC CORE + is a robust, 19 inch compatible optical frequency comb based on Erbium fiber technology. It is the core system for applications like optical clocks, micro wave generation or phase-locking of cw-lasers and can be equipped with additional wavelength extensions and options. Its unique fCEO-stabilization is based on Difference Frequency Generation (DFG) and comes with many advantages such as high robustness and ultra-low phase noise.
The DFC CORE + features an outstanding stability and accuracy which is suitable for use with the best optical clocks. More than 20 years of engineering experience building high-quality scientific and industry-grade lasers went into its design, it’s a true TOPTICA laser.
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- Comb spacing: 80 MHz or 200 MHz
- Stability: 8 · 10-18 in 1 s*, 5 · 10-20 in 1000 s*
- Accuracy: 1 · 10-18 for τ > 100 s*
- Integrated phase noise fCEO: < 65 mrad [70 mHz - 20 MHz]
- Linewidth: < 1 Hz (locked to optical reference) 20 kHz free running
- Turn-key, full remote control
- Patented CERO (“zero-fCEO”) technology
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Download technical brochure here.
Specifications
| Specifications | DFC CORE + | |
|---|---|---|
| Center wavelength | 1560 nm (other wavelengths see DFC Extensions) | |
| Comb spacing | 200 or 80 MHz | |
| Laser outputs | 4 or 8, fiber coupled, polarization maintaining, FC/APC | |
| Bandwidth | > 20 nm, each output | |
| Power | > 10 mW, each output | |
| Integrated phase noise fCEO | < 40 mrad [100 Hz - 2 MHz], < 65 mrad [70 mHz - 20 MHz] | |
| Linewidth @ 1560 nm | < 1 Hz * | < 30 kHz, typ. 20 kHz (**, free running) |
| Loop bandwidth frep lock | > 400 kHz (typ. 450 kHz)* | 10 kHz, optimal with DFC RF |
| Stability | 8 · 10-18 in 1s *, 5 · 10-20 in 1000 s* | 1 · 10-13 in 1 s** |
| Accuracy | 1 · 10-18 for τ > 100 s* | 1 · 10-14 for τ > 100 s** |
| Bandwidth piezo frep | > 70 kHz | |
| Reference | Optical reference*** or DFC RF***, Low-noise oven-controlled quartz (OCXO) | |
| Reference input | · 800 MHz for RF reference · 10 MHz with DFC RF · High bandwidth Imod (DC - 10 MHz) for optical reference |
|
| Dimensions (H x W x D) | 133 x 450 x 633 mm³, incl. electronics | |
| Cooling requirements | Air cooled | |
| Power consumption | < 110 W | |
| Operating temperature | 21 ± 4 °C | |
| Weight | < 30 kg | |
| Power supply | 100...120 V / 220...240 VAC, 50...60 Hz (auto detect) | |
| Control computer | Laptop, Windows 10, english | |
| * Phase-locked to optical reference, ** Phase-locked to RF reference, *** not included | ||
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