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All-optical modulation and demultiplexing systems with significant timing jitter tolerance through incorporation of pulse-shaping fiber Bragg gratings

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5 Author(s)
Ju Han Lee ; Optoelectron. Res. Centre, Southampton Univ., UK ; Peh Chiong Teh ; Petropoulos, P. ; Ibsen, M.
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In this letter, we demonstrate the use of a superstructured fiber Bragg grating to preshape optical pulses to obtain optimal operation of nonlinear all-optical switches. Specifically, we demonstrate the conversion of 2.5-ps soliton pulses into 20-ps rectangular pulses at the input to both fiber and semiconductor optical amplifier-based switches, and show that rectangular switching windows can be achieved thereby providing a 5-10-fold reduction in timing jitter sensitivity. Error free penalty free optical time-division-multiplexing switching was readily achieved over a /spl plusmn/7-ps timing mismatch range for the square pulse driven fiber nonlinear optical loop mirror switch versus a /spl plusmn/1-ps range for the switch driven directly with 2.5-ps laser pulses.

Published in:

Photonics Technology Letters, IEEE  (Volume:14 ,  Issue: 2 )