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

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4 Author(s)
Bagnell, M. ; Coll. of Opt. & Photonics, Univ. of Central Florida, Orlando, FL, USA ; Davila-Rodriguez, J. ; Williams, C. ; Delfyett, P.J.

A frequency comb is used as a set of coherent local oscillators to downconvert and spectrally compress white light that has been 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 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.

Published in:

Photonics Journal, IEEE  (Volume:4 ,  Issue: 2 )

Date of Publication:

April 2012

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