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Optica Publishing Group
  • CLEO/Europe and IQEC 2007 Conference Digest
  • (Optica Publishing Group, 2007),
  • paper CI7_4

Packet clock recovery at 40 Gb/s and beyond, using a Fabry-Pérot filter and an optical power limiter based on a bismuth oxide fibre

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Abstract

Packet clock extraction appears as a key functionality for the realization of optical packet switched networks at lùgli data rates, necessitating all-optical clock recovery (CR) circuits capable of immediately acquiring the timing infonnation and retaining the synchronization signal only for duration similar to the duration of the respective data packets. In the present paper we demonstrate successful CR from short optical packets at 40 Gb/s, using a recently introduced technique [1] that allows in principle for operation at ultra-lùgli bit rates far beyond 40 Gb/s. The technique is based on the previously reported scheme [2] that uses a Fabry-Pérot Filter (FPF) for producing a clock resembling signal, followed by an optical power limiter in order to remove the strong peak power variation of the FPF’s output, and thus provide a clock signal of lùgli quality. Unlikely to the previous implementations of the scheme, the power limiting functionality is not based on semiconductor-based devices, but rather on the use of a nonlinear fiber, erasing in principle any operational bit rate limitations of the scheme.

© 2007 IEEE

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