Phase-induced intensity noise in Bragg-grating-pair delay line signal processors

Investigation of the phase-induced intensity noise generated by fibre Bragg-grating-pair delay line signal processors is presented. The phase noise expressions of the transmissive and reflective Bragg-grating-pair structures are derived for the first time. They show that the transmissive and reflective structures have different phase noise spectra even though they have the same transfer characteristic. Experimental results are presented to verify the theory.