Multiheterodyne Detection and Sampling of Periodically Filtered White Light for Correlations at 20 km of Delay

Multiheterodyne Detection and Sampling of Periodically Filtered White Light for Correlations at 20 km of Delay

Blog Article

A frequency comb is used as a set of coherent local oscillators to downconvert and spectrally compress white light that has been click here periodically filtered by a Fabry–Perot etalon.Multiheterodyne detection allows white light spread across 100 GHz of optical spectrum to be compressed to 5 GHz of radio frequency (RF) bandwidth for electronic sampling on an oscilloscope.Correlations are observed at delays of up to chorulon hcg 20 km with a minimum resolution of less than 1 mm.

Calculations show that resolution may be easily increased by increasing etalon finesse and frequency comb bandwidth.