Nazli Rahmanian

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Using air-trench bends, an ultracompact 8 times 8 arrayed waveguide grating (AWG) demultiplexer (200-GHz channel spacing) for wavelength-division multiplexing (WDM) has been designed and fabricated with perfluorocyclobutyl (PFCB) core and clad co-polymers on a polyimide substrate. Compared to a conventional AWG in the same material system, the air-trench(More)
School of Graduate Studies The University of Alabama in Huntsville Degree Doctor of Philosophy Program Optical Science and Engineering Name of Candidate Nazli Rahmanian Title High Efficiency Perfluorocyclobutyl Air-trench Splitters for Use in Compact Ring Resonators Planar lightwave circuits with higher integration, lower cost, and added functionality can(More)
A fabrication process for PFCB waveguide air-trench bends and splitters with scanning electron microscope (SEM)-based electron beam lithography (EBL) with alignment accuracy better than 40 nm has been developed. High efficiency air-trench bends (97.2% for TE polarization and 96.2% for TM polarization) have been demonstrated. The fabrication of air-trench(More)
Crude oil and gas are naturally occurring mixtures composed of mainly hydrocarbons and small amounts of nonhydrocarbon compounds such as sulfur, oxygen, and nitrogen. Crude oil and gas samples are characterized in petroleum engineering by their different physical properties. The composition of reservoir fluid is known as the most significant factor, which(More)
We demonstrate air-trench splitters in low index contrast perfluorocyclobutyl (PFCB) waveguides. Splitters are fabricated by etching 800 nm wide high aspect ratio (18:1) trenches. The measured optical loss is 0.4 dB/splitter. The reflection/transmission splitting ratio is 0.859/0.141, which closely matches two-dimensional finite difference time domain(More)
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