Integrated optical time delay unit

A system for providing time delays for an optical signal comprising:

• an input port for receiving an input optical signal having a predetermined polarization;
• an output port;
• an optical splitting device coupled to said input port and said output port for splitting optical signals relative to the polarization of the input optical signal;
• a polarization rotating device for rotating the polarization of said input optical signal and reflected optical signals, said polarization rotating device coupled to said optical splitting device and a waveguide device;
• and
• a waveguide device coupled to said polarization rotating device, said waveguide device including one or more reflective devices for reflecting optical signals having predetermined wavelengths to said polarization rotating device, said reflective devices spaced along said waveguide for reflecting optical to said output port to provide predetermined time delays of said input optical signal.