DFC (Difference Frequency Comb)
Fully referenced optical frequency comb system based on patented zero-offset CERO technology.
-Passive zero-offset locking: Uses patented CERO technology for inherent stabilization of the carrier-envelope offset (f₍CEO₎=0) without active control loops.
-Ultra-low phase noise & narrow linewidth: Outstanding phase and spectral purity, suited for precision tasks such as optical clock comparison.
-Turnkey operation: Ready-to-use, robust system with remote control via unified software interface.
-Modular architecture: Wavelength extension modules extend coverage from approx. 420 nm to 2200 nm; optional beat detection and locking electronics are available.
-Multi-output fiber delivery: Standard with 4 offset-free outputs (optional 8 outputs), fiber-coupled, polarization-maintaining with broad bandwidth.
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Description
TOPTICA’s DFC (Difference Frequency Comb) is a high-end, robust optical frequency comb platform typically built around the DFC CORE + system. It uses difference frequency generation (DFG) and patented CERO technology to passively stabilize the comb’s carrier-envelope offset frequency (f₍CEO₎), yielding an inherently offset-free comb with ultra-low phase noise and narrow linewidth. Modular wavelength extensions enable broad spectral coverage, and integrated electronics provide automated locking to optical or RF references for precision metrology and synchronization tasks.
Specifications
Center Wavelength : ~1560 nm (extensions available ~420–2200 nm)
Comb Spacing : 80 MHz or 200 MHz
Output Channels : 4 (standard) or 8 (option)
Output Bandwidth : > 20 nm per output
Output Power : > 10 mW per output
Offset Frequency : f₍CEO₎ = 0 (passively stabilized)
Phase Noise : < 65 mrad (70 mHz-20 MHz)
Linewidth : < 1 Hz (locked)
Stability : ~8 × 10⁻¹⁸ (1 s) / ~5 × 10⁻²⁰ (1000 s)
Dimensions : 133 × 450 × 633 mm (approx.)
Power Consumption : < 110 W
Application
DFC frequency combs are used in cutting-edge precision applications such as
Optical clock comparison and calibration.
Precision spectroscopy and molecular metrology.
Frequency locking of continuous-wave lasers (CW lasers).
Photonic microwave signal generation and metrology.
Quantum technology and ultrafast science tools.
Publications