Low Cost WDM Component Technology for Bit-Parallel Fiber Optic Computer Networks

The bit-parallel fiber optic computing network is based on sending all bits in a word on parallel wavelength channels. A high-powered shepherd pulse launched with the signal wavelengths exploits the nonlinear response of the optical fiber to cancel dispersion and thus prevent temporal dephasing of synchronous signal bits. In this Phase I proposal, Lightwave Microsystems will design and fabricate integrated optoelectronic components related to the bit-parallel network. These elements include a 2x2 optical switch and 1:8 splitter based on directional couplers, and a 4-channel multiplexer/demultiplexer based on arrayed waveguide grating technology operating at 1550 nm. Samples of these three devices will be delivered to Dr. Larry Bergman at the Jet Propulsion Laboratory, where they will be tested. The tests will determine the devices' applicability to the bit-parallel network, and how the shepherd pulse interacts with the optical devices. At the conclusion of this Phase I proposal, a preliminary design will be created for integrating the switch, splitter, and multiplexer to create 6x6 switching node for the bit-parallel network.