Design and characterization of InP based Mach-Zehnder modulators at 2μm wavelength

Show simple item record

dc.contributor.advisor Corbett, Brian en
dc.contributor.advisor Roycroft, Brendan en Sadiq, Muhammad Usman 2017-01-20T11:50:40Z 2017-01-20T11:50:40Z 2016 2016
dc.identifier.citation Sadiq, M. U. 2016. Design and characterization of InP based Mach-Zehnder modulators at 2μm wavelength. PhD Thesis, University College Cork. en
dc.identifier.endpage 202 en
dc.description.abstract The Mach-Zehnder modulators (MZMs) based on InP are the key building blocks of photonic integrated circuits (PICs) due to low drive voltage and higher electro-optic (EO) bandwidth. They are the most suitable candidates to replace the widely deployed large footprint Lithium Niobate (LiNbO3) based MZMs. This thesis is focused on the design and development of travelling wave InP MZMs operating in the conventional optical C-band and also at 2000 nm which is one of the newly proposed possible alternatives for optical transmission to avoid highly anticipated ‘Capacity Crunch‘in the currently deployed standard single mode fiber (SSMF) in the next decade. InP MZMs working around the 1550 nm wavelength range were developed and characterised under DC and high frequency in order to validate the optimal electrode design. The highlight of presented work is the development of the first InP MZMs for operation around 2000 nm wavelengths for used in future optical transmission systems. To make the operation feasible around 2000 nm wavelength, compressively strained InGaAs QWs are used in the optical waveguide. The developed modulators exhibit a 3-dB EO bandwidth of 9 GHz with switching voltage as low as 3.2 V for a 3 mm long electrode. It is also shown that maximizing the electro-optical overlap by increasing the number of quantum wells can significantly reduce the Vπ, hence the modulator driving conditions for higher order modulation formats, without sacrificing the modulation bandwidth and device dimensions. Further, the devices are packaged using specially designed RF interposer to be used in an efficient, high-capacity WDM transmitter for communication over 1.15 km hollow-core photonic bandgap fiber (HC-PBGF) at 2 μm wavelength. A WDM capacity of 40 Gb/s is accomplished by using four 10 Gb/s NRZ-OOK externally modulated channels for the first time and transmission performance is evaluated using a direct detection receiver. en
dc.format.mimetype application/pdf en
dc.language English en
dc.language.iso en en
dc.publisher University College Cork en
dc.rights © 2016, Muhammad Usman Sadiq. en
dc.rights.uri en
dc.subject Mach Zehnder modulators en
dc.subject 2000 nm Modulators en
dc.subject InP based MZM en
dc.subject Photonic integrated circuits en
dc.subject 2000 nm modulators en
dc.subject Ramped quantum wells en
dc.title Design and characterization of InP based Mach-Zehnder modulators at 2μm wavelength en
dc.type Doctoral thesis en
dc.type.qualificationlevel Doctoral en
dc.type.qualificationname PhD (Science) en
dc.internal.availability Full text available en No embargo required en
dc.description.version Accepted Version
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder University College Cork en
dc.contributor.funder Tyndall National Institute en
dc.description.status Not peer reviewed en Physics en Tyndall National Institute en
dc.check.type No Embargo Required
dc.check.reason No embargo required en
dc.check.opt-out Not applicable en
dc.thesis.opt-out false
dc.check.embargoformat Not applicable en
dc.internal.conferring Spring 2017 en

Files in this item

This item appears in the following Collection(s)

Show simple item record

© 2016, Muhammad Usman Sadiq. Except where otherwise noted, this item's license is described as © 2016, Muhammad Usman Sadiq.
This website uses cookies. By using this website, you consent to the use of cookies in accordance with the UCC Privacy and Cookies Statement. For more information about cookies and how you can disable them, visit our Privacy and Cookies statement