FFC-100 Fiber Frequency Comb

FFC-100 octave-spanning, fully stabilized fiber frequency comb

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  • Turn-key operation
  • 1560 nm center wavelength
  • >30 mW in supercontinuum
  • Low phase & amplitude noise
  • A single 2U 19″ rack-mounted enclosure
  • ƒrep monitoring, control, and matching
  • Input port for ƒopt
  • Repetition rates from 80 MHz to 250 MHz
  • Made in America


  • Time & frequency keeping & transfer
  • Frequency ruler
  • Dual- & multi-comb spectroscopy
  • Quantum sensing, computing, & cryptography
  • Low-phase noise rf generation

The FFC-100 from Vescent Photonics is a fully stabilized octave-spanning frequency comb with precise control over the repetition rate (ƒrep), optical reference (ƒopt), and the carrier envelope offset frequency (ƒCEO). It is built around the Vescent MLL-100 Mode-Locked Laser, a stand-alone erbium-based femtosecond MOPA. A highly non-linear fiber broadens the spectrum and our unique ƒCEO lock detection reduces the size, weight, and power of the system. The complete FFC-100 frequency comb is designed and built to ensure stable, low-phase noise operation with Allan Deviations supporting the next generation of optical atomic clocks.

The FFC-100 was designed for low SWaP and turn-key, stable operation: A single 2U 19” rack mount chassis contains the oscillator, amplifier, pump lasers, supercontinuum generation module, and ƒCEO detection and lock as well as the control electronics. 

The simple oscillator mode locks at startup every time and the innovative passive SESAM mode-locker is specially designed for a robust, long life. Our unique oscillator design also makes it easy to precisely factory match the repetition rate of two (or more) FFC-100 combs for multi-comb spectroscopy experiments.

US Patent 11,462,881

The FFC-100 is made in America

FFC-100 Specifications

Parameter Min. Typ. Max. Units Comments 
Center Wavelength 1555 1565 1575 nm  
Repetition Rate 100   200 MHz

 100 or 200 MHz

Contact factory for other repetition rates.

Optical Powers         All connectora PM FC/APC
Oscillator Average Output Power 0.01     mW >15 nm optical bandwidth
Amplifer Average Output power 5     mW >30 nm optical Bandwidth
Supercontinuum Output Power 20     mW 1000-2000 nm spectrum
RF Outputs         All connectors SMA
ƒCEO Signal-to-Noise Ratio 35     dB 100 kHz RBW
ƒCEO Integrated Phase Noise     1 rad 10 Hz-1 MHz
ƒCEO Frequency Stability2     5.0x10-17/r Unitless in-loop Allan Deviation
ƒopt Optical Input Power     1 mW  
ƒopt Signal-to-Noise Ratio3   40   dB 100 kHz RBW
ƒopt Integrated Phase Noise3   300   mrad 10 Hz-1 MHz
ƒopt Frequency Stability2,3   2.5x10-17/r   Unitless in-loop Allan Deviation
ƒrep Output Power Level   0   dBm  
Frequency Transducers          
ƒCEO Tuning Range 100     MHz Pump Current Tuning
ƒCEO Input Voltage Tuning Range -10   +10 V SMA Input
ƒrep PZT Tuning Range 30     Hz Depends on Repetition Rate. See temperature tuning spec allows for larger changes in ƒrep
ƒrep Input Voltage Tuning Range 0   +6 V SMA Input
ƒrep Temprature Tuning Range 25     kHz Touchscreen Control4
ƒrep Temprature Tuning Sensitivity 0.5     kHz/°C Depends on Repetition Rate
Size, Weight, and Power          
Line Voltage 90   250 VAC 50/60Hz
Power Consumption     50 W  
Weight   5.5   kg  
Size   12.3   L 2U rack mount, 43.5 cm Width x 10.5 cm Height x 27 cm Depth

1 Does not include the SLICE-FPGA controller, which is sold separately.
2 Allan Deviation from zero-dead-time L counter with 1s gate time.
3 Depends on user-supplied optical reference. Data given for 1 kHz 1560 nm reference laser with >0.1 mW input power when phase locked with a SLICE-FPGA.
4 Allows access to a slow servo correction mode that automatically changes oscillator cavity temperature so that the PZT is centered in its operating range.