Document Type


Date of Award


Degree Name

Master of Science in Electrical Engineering - (M.S.)


Electrical and Computer Engineering

First Advisor

Janet Lehr Jackel

Second Advisor

Roy H. Cornely

Third Advisor

Haim Grebel


To be of practical use in optical communications networks, optical components must have both low on-chip losses and efficient coupling to fibers, semiconductor lasers and detectors. In this thesis work two types of channel waveguides were designed and fabricated on BK7 glass substrate using a low-cost ion-exchange process. The first type of waveguide was formed in a simple sequence of ion-exchange and post-exchange annealing. These single mode waveguides had large mode size and were efficiently coupled to single mode fibers. The lowest loss achieved in fiber-guide direct coupling was 1.25 dB. The second type of waveguide was formed in a two-step inverse ion-exchange. The single mode waveguides formed in this way had small mode size and were compatible with lasers. The lowest loss achieved in laser-guide butt coupling was around 4 dB. The on-chip mode size transition from laser-compatible to fiber-compatible could be achieved by a thermal tapering annealing step.



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