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.

  • 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

Download Short Form information here.

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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