University of Twente Student Theses


Alignment in Integrated Optical Systems

Nonhebel, R.P. and Stienen, B.P.J. (2013) Alignment in Integrated Optical Systems.

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Abstract:The goal of this research was to find a reliable method to couple light into an integrated optical system. In order to find such a method, experiments have been conducted to couple light of 1560 nm originating from a superluminescent diode, into two different waveguide chips: a silicon nitride (Si3N4) waveguide chip with silicon oxide (SiO2) cladding and a indium phosphide (InP) waveguide chip. On this last one, also an MMI coupler was present. Coupling into the silicon nitride waveguide succeeded manually by using a translation stage. For coupling into the indium phosphide waveguides a higher precision was needed. Therefore, a LabVIEW program was developed to move a piezo controlled stage with 5 nm precision and a traveling range of 20 μm. Mounting a light guiding fibre on the stage, the program can be used to move the fibre in such manner that an area of 20 μm x 20 μm can be scanned. During the scanning the program records data from a camera in order to analyse if coupling has been accomplished during the scan sequence. The program has yet to be proved working, because no light was observed in any of the experiments to be coupled into the used MMI coupler. However experiments using a beam profiler indicated that this is caused by the experimental set-up and not by the program.
Item Type:Essay (Bachelor)
Faculty:TNW: Science and Technology
Subject:33 physics
Programme:Applied Physics BSc (56962)
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