Hybrid-integrated high-speed OTDM module

An integrated optical time division multiplexing (OTDM) module comprising:

• an integrated modulator chip including an input fiber tube for receiving an end portion of an input fiber, first and second modulators each connected on input ends thereof to the input fiber tube and on output ends thereof to respective first and second variable optical attenuators, the first and second variable optical attenuators having respective first and second outputs coupled to an input end of an integrated time-delay chip;
• and
• the integrated time-delay chip including first and second waveguides, formed on a substrate of the integrated time-delay chip and operable to guide a first and second optical Return-to-Zero signal streams through the integrated time-delay chip, for receiving said respective first and second outputs of said first and second variable optical attenuators of the integrated modulator chip, one of the first and second waveguides being of greater length than the other of the first and second waveguides, the integrated time-delay chip further comprising an output fiber tube for securing an end portion of an output fiber,
• where the integrated time-delay chip is operable to combine the first and second optical Return-to-Zero signal streams including interleaving the first and second waveguides on the integrated time-delay chip.

An integrated optical time division multiplexing (OTDM) module comprising:

• an integrated time-delay chip adapted to receive an incoming short-pulse signal stream from a pulsed source, the integrated time-delay chip comprising first and second waveguides formed on a substrate of the integrated time-delay chip for guiding the signal streams through the integrated-time delay chip and adapted to divide the incoming short-pulse signal stream into first and second short-pulse signal streams for transmission along the first and second waveguides of integrated time-delay chip, one of the first and second waveguides being of greater length than other of the first and second waveguides thereby introducing a prescribed optical delay between the first and second short-pulse signal streams;
• and
• an integrated modulator chip coupled to the integrated time-delay chip, the integrated modulator chip comprising first and second waveguides and adapted to receive the first and second short-pulse signal streams from the integrated time-delay chip and to generate first and second optical Return-to-Zero signal streams from the first and second short-pulse signal streams, wherein an end facet of the integrated modulator chip is coated with a reflective coating to reflect the first and second optical Return-to-Zero signal streams along the first and second waveguides of the integrated modulator chip towards the first and second waveguides of the integrated time-delay chip.

An integrated optical time division multiplexing (OTDM) module comprising:

• an integrated modulator chip for generating a plurality of optical Return-to-Zero signal streams;
• and
• an integrated time-delay chip coupled to the integrated modulator chip for introducing prescribed optical time delays between each of the plurality of optical Return-to-Zero signal streams and for combining said plurality of optical Return-to-Zero signal streams after introduction of the prescribed delays, the integrated time-delay chip including a plurality of waveguides formed on a substrate of the integrated time-delay chip for introducing an optical delay and operable to guide the plurality of optical Return-to-Zero signal streams through the integrated time-delay chip,
• where the integrated time-delay chip is operable to combine the plurality of optical Return-to-Zero signal streams including interleaving the plurality of waveguides on the integrated time-delay chip.