A new /spl phi//2-shift-BPSK signal by superstructure fibre Bragg grating en/decoder

A weak interference /spl phi//2-shift-BPSK encoding and high contrast autocorrelation peak are demonstrated using a novel superstructure fibre Bragg grating en/decoder. The uniform reflectivity of encoders with different code pattern has been achieved by newly developed /spl phi//2-shift-BPSK encoding.