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Decentralized frequency stabilization scheme for a dense OFDM system involving simple filters and an absolute reference

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7 Author(s)
Kruger, U. ; Heinrich-Hertz-Inst., Berlin, Germany ; Kruger, K. ; von Helmolt, C. ; Pawlowski, E.
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A frequency control scheme is introduced where within each transmitter its frequency is referenced to a silica based optical frequency discriminator, which in addition is locked to an absolute reference frequency. An absolute stability of ±1 GHz was achieved. As frequency-determining elements, coupler-based Michelson interferometers or coated gradient-index (GRIN) lenses were used. The described set-up is employed in an OFDM based optical crossconnect-demonstrator (RACE 2065; COBRA)

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Lightwave Technology, Journal of  (Volume:14 ,  Issue: 5 )