Next generation radar systems for tactical aircraft will need to improve aircraft survivability, allow for cooperative multistatic mode of operation, provide efficient anti-jamming features, and compensate for motion- induced clutter. Faster digital processors are required, in particular analog- to-digital converters (ADCs) for digital processing of X-band radar systems. This effort investigated and demonstrated an optoelectronic scheme for a high- speed optical ADC. The system was designed with the following objectives ...
Three experiments were performed during this effort. The first experiment measured the pump induced wavelength shift of a 1550 nm probe signal in a 100 cm CdSSe doped fiber. This initial experiment provided the necessary data which formed the basis for the design of a new all-optical switch. The second experiment was the fabrication of the all-optical switch. The operation of the switch was based ...
A non-linear, doped spaciality fiber was fabricated consisting of cadmium sulfur selenide (CdSSe). The fiber had a core composed of a Schott Glass material (RG630). The RG630 is a CdSSe/glass composite material in which the semiconductor is in the form of nano-spherical particles with average diameter of 3.7 nm and occupies a volume fraction of 0.32%. Previous theoretical modeling indicated that such a semiconductor doped fiber would have a nonlinear ...
The opto-electronic development program has moved forward substantially during the last year. In the 100GHz receiver program with Wright Patterson Air Force Base, new approaches to the implementation of high speed lasers and detectors have been devised. These structures include transmission lines with phase velocities matched to the group velocity of the optical waveguide to eliminate the limitation of the device capacitance and output impedance. A new process sequence has ...
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