Abstract: The present invention describes systems and methods of providing optical information transmission systems. An exemplary embodiment of the present invention includes a precoder configured to differentially encode a binary data signal, a duobinary encoder configured to encode the differentially encoded binary data signal as a three-level duobinary signal, an electrical-to-optical conversion unit configured to convert the three-level duobinary signal into a two-level optical signal, and an optical upconversion unit configured to modulate the two-level optical signal onto a higher frequency optical carrier signal and transmit the modulated higher frequency optical carrier signal onto an optical transmission medium.

Abstract: A wireless communication system adapted to transmit data between two locations, for example between a plurality of processors and memory. Digitally coded millimeter waves can be used to transfer data between antenna arrays. A global optical clock can provide network coherence, frequency self-tracking, and a local oscillator signal for data digital symbol coding/decoding and symbol up-down conversion to/from the millimeter wavelength carrier.

Abstract: A centrally-managed, colorless, bi-directional wavelength division multiplexed passive optical network (WDM-PON) architecture. The WDM-PON architecture is self-survivable, and can protect network failures in, for example, distribution/feeder fiber, remote node and laser failure. The WDM-PON architecture requires only N-wavelength channels for N optical network units.

Abstract: An optical signaling header technique applicable to optical networks wherein packet routing information is embedded in the same channel or wavelength as the data payload so that both the header and data payload propagate through network elements with the same path and the associated delays. The technique effects survivability and security of the optical networks by encompassing conventional electronic security with an optical security layer by generating replicated versions of the input data payload at the input node, and the transmission of each of the replicated versions over a corresponding one of the plurality of links. Moreover, each of the links is composed of multiple wavelengths to propagate optical signals or optical packets, and each of the replicated versions of the data payload may be propagated over a selected one of the wavelengths in each corresponding one of the plurality of links.