A novel optical transversal delay line signal processor based on the u
se of in-fibre Bragg grating reflectors as tapping elements is present
ed. The requirements on reflectivity mismatch are analysed, and this i
s accurately controlled using postprocessing techniques. Results on fr
equency discriminator filters using reflectively tapped optical transv
ersal filter structures demonstrate uniform and level responses >20GHz
with notch depths >44dB.