Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"Add/drop filter"”.
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Athermal photonic devices and circuits on a silicon platform
… index (thermo-optic (TO) coefficient) shifts the filter response of resonant devices that limit wavelength resolution in various applications. Active thermal compensation using heaters and thermo-electric coolers are the legacy solution for low density integration. However, the required electrical …
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Integrated optical filters using Bragg gratings and resonators
This thesis provides an in-depth study of optical filters made using integrated Bragg gratings and Bragg resonators. Various topologies for making add/drop filters using integrated gratings are outlined. Each class of devices is studied in detail and the theoretical tools needed for designing the …
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Integrated optical switching using titanium nitride micro electromechanical systems
… (MEMS). The device consists of a ring resonator add-drop filter and a conductive MEMS bridge which is actuated by electrostatic force. Introducing conductive material into the electromagnetic evanescent field of the ring waveguide results in loss in the propagating light within, disabling the …
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Low Loss Integrated Photonic Devices and Their Applications in Astrophotonics and Quantum Information
… crosstalk (<-30dB). We demonstrate an on-chip add-drop filter working on arbitrarily spaced five channels based on the complex waveguide Bragg gratings and the multimode interferometer (MMI). A more than 40 dB extinction ratio is achieved in all five channels and the device is shown to be low …
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Crosstalk and Signal Integrity in Ring Resonator Based Optical Add/Drop Multiplexers for Wavelength-Division-Multiplexing Networks
… thesis has focused on the crosstalk in Optical Add/Drop Multiplexers (OADMs) as an EMC problem. The main research question is: “How can signal integrity be improved and crosstalk effects mitigated in small-sized OADMs in order to enhance the optical EMC in all-optical networks and contribute to …
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Liquid Crystal Optics For Communications, Signal Processing And 3-d Microscopic Imaging
… dimensions whereas an NLC lens is used to address the third dimension to complete a three dimensional (3-D) scanner. Such an NLC deflector was then used in a variable optical attenuator (VOA), whereby a laser beam coupled between two identical single mode fibers (SMF) was mis-aligned away …