Ehab Shoukry

1/spl times/2 and 1/spl times/4 electrooptic switches

We describe the design, fabrication, and testing of two packaged electrooptic switches built from poled LiTaO/sub 3/ crystals. The 1/spl times/2 switch requires a driving voltage of 1200 V and exhibits insertion loss of 2.4 dB and crosstalk of -39.2 dB; the 1/spl times/4 switch exhibits insertion loss and crosstalk of 2.8 dB and -40.6 dB, respectively, and operates using a 1100-V voltage source. The maximum deflection time between the channels is 86 ns.

Design of a fully integrated array of high-voltage digital-to-analog converters

The first fully integrated array of high voltage (HV) digital-to-analog converters (DACs) was designed in DALSA Semiconductors 0.8 /spl mu/m CMOS/DMOS HV process technology. The 6-bit 300 V DACs are based on a current-steering, thermometer coded architecture and show a DNL (differential nonlinearity) of 0.16 LSB and an INL (integral nonlinearity) of 0.18 LSB. The current-to-high-voltage conversion is done using a high-compliance current mirror adapted to the HV technology, as traditional output resistor or op-amp solutions are not optimum for the HV process. The design is suited for applications requiring a set of digitally-controlled high-voltage signals.

Reprogrammable optical phase array

A novel reprogrammable optical phase array (ROPA) device is presented as a reconfigurable electro-optic element. One specific application of the ROPA, a 1 x 6 electro-optic space switch, is fully described. Switching angles are within 2 degrees , and switching is achieved through a complementary metal-oxide semiconductor (CMOS) controlled, diffraction based, optical phase array in a bulk BaTiO3 crystal. The crystal is flip-chipped to the CMOS chip, creating a compact fully integrated device. The design, optical simulation, and fabrication of the device are described, and preliminary experimental results are presented.

Reprogrammable optical phase array (ROPA) for use in an agile all-photonic network

The design and simulation of a 1×N optical switch is presented. Sub-¿s switching is achieved through a voltage-controlled optical phase array. Electrode voltages are provided by a high-voltage CMOS chip. Switching angles are within 2°.

Reprogrammable Optical Phase Array (ROPA) used as a 1×6 space switch

The design, simulation and testing of a 1times6 optical switch is presented. Switching is achieved through a voltage-controlled optical phase array. Electrode voltages are provided by a high-voltage CMOS chip. Switching angles are within 2deg