Two-User 150-km Field Fiber Security Enhanced SPECTS O-CDMA Transmission

We demonstrate two-user error-free performance of security enhanced spectral phase-encoded time-spreading optical code-division multiple-access across a 150-km field fiber link. The testbed incorporates a 64-mode optical frequency comb source, a fully integrated silica arrayed waveguide grating spectral phase encoder/decoder, and a tunable dispersion slope compensator. Physical layer security is enhanced by using a bright code/dark code modulation format