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Fibre-optic recirculating analogue delay line

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4 Author(s)
Wang, C.C. ; Naval Research Laboratory, Washington, USA ; Moeller, R.P. ; Burns, W.K. ; Kaminow, I.P.

A 0.5 ms delay line with a time-bandwidth product of > 105 is demonstrated by recirculating a 2 ns pulse around a 20.4 km single-mode fibre five times. Analogue signal regeneration is employed after each recirculation. System dynamic range, signal/noise ratio and cancellation ratio for a noncoherent moving target indicator radar application are given.

Published in:

Electronics Letters  (Volume:20 ,  Issue: 12 )