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Tunable optical delay line based on a fibre Bragg grating

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4 Author(s)
G. W. Yoffe ; Opt. Fibre Technol. Centre, Sydney Univ., NSW, Australia ; J. W. Arkwright ; G. E. Town ; B. G. Smith

A tunable fibre optic delay line is demonstrated using a uniform fibre Bragg grating. A segment of the grating is heated increasing its Bragg wavelength so that a signal propagating outside the nominal stop-band is reflected from that point. The position of the heater along the length of the grating determines the time delay encountered by the signal. For a 10 cm apodised grating, a delay of up to 700 ps was obtained

Published in:

Electronics Letters  (Volume:34 ,  Issue: 17 )