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





Optical Outputs

Supercontinuum, Oscillator, and Amplifier

FC/APC PM fiber at 1,550 nm, key aligned to slow axis

Repetion Rate Control

PZT Modulation Control 0.3 - 1 ppm Depends on repetition rate
PZT Control bandwidth >200 kHz  
Temperature Control Range ±10 kHz 15-50°C
Open-loop Repetition Rate Stability <1 ppm/°C Relative to room temperature

Oscillator Performance

Center Wavelength 1,560 ± 10 nm  
Nominal Repetition Rate 100, 125, 200 MHz Can be factory-tuned to within 5 kHz
Oscillator Monitor Output Power

250 µW

Bandwidth >10 nm  
Pump Power Modulation Bandwidth >1 MHz Actual bandwidth limited to ~30 kHz by Erbium-doped fiber
Polarization Exxtinction Ration >20 dB  

Supercontinuum Performance

Bandwidth 1,000 - 2,000 nm  
Average Power 30 mW  

Monitor Outputs

SNR >50 dB  
RF Bandwidth >500 MHz  
RF Power > -10 dBm  
SNR >40 dB  
RF Bandwidth >50 MHz  
RF Power > -40 dBm  
SNR >35 dB  
RF Bandwidth >50 MHz  
RF Power > -40 dBm  

Physical Properties

Power In

100-230 VAC, 1 phase, 50-60 Hz

Power Consumption <40 W  

2U 19" rack mount

19 x 10 x 3.5"