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CERO - How it works  
URL: /technology/toptica-proprietary/cero-1#c22588
How it works The operating principle of the offset-free Difference Frequency Comb (DFC) relies on generating a broadband supercontinuum from the output of a low noise Er-fiber mode-locked oscillator…  
Perfect lock to optical reference  
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This is proof of the exceptional coherence of the all comb lines of the RF-locked DFC CORE +. Moreover, it shows that there is truly zero noise at the frequency origin, anything acting on the DFC…  
Perfect lock to optical reference - Perfect lock to optical reference  
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Perfect lock to optical reference The DFC is especially suitable for use with an optical reference like a narrow linewidth laser. If stabilized to such an optical reference the frequencies of the…  
100 times faster noise reduction  
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Each laser pulse is travelling through the amplifier chain, non-linear fiber and DFG unit individually. This means each pulse is broadened to a super continuum individually and the Difference…  
100 times faster noise reduction  
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Each laser pulse is travelling through the amplifier chain, non-linear fiber and DFG unit individually. This means each pulse is broadened to a super continuum individually and the Difference…  
100 times faster noise reduction - 100 times faster noise reduction  
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100 times faster noise reduction DFG is taken for each pulse individually (intra-pulse DFG) All-optical phase-lock Not limited by bandwidth of electronic feedback Two orders of magnitude…  
Ultra-low noise and narrow linewidth  
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high modulation contrast -> 97 % high degree of CEP short term stability Stability limited by slow drift of the interferometer 12 mrad (rms) phase stability in 20 s View all…  
Ultra-low noise and narrow linewidth  
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Figure 3 shows a time trace of the fringes over 25 seconds and the CEP which has been extracted by Fourier transformation. We deduce 12 mrad phase stability in 25 seconds.View all products  
Ultra-low noise and narrow linewidth  
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Figure 2 shows the ultra-low phase noise of the DFC CORE + measured according to Liehl et al. The long-term CEP stability can be characterized if the bandpass filters and balanced detection from…  
Ultra-low noise and narrow linewidth  
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The carrier envelope offset frequency fCEO of the DFC CORE +  is zero because of the DFG process implemented in the CERO-Technology . Since it is hard to measure a signal at the frequency…  
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