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 10cm apodised grating, a delay of up to 700ps was obtained.
|Number of pages||3|
|Publication status||Published - 20 Aug 1998|