Inscription of 3D directional couplers with a femtosecond pulse duration laser and spatial light modulator: towards all-multi-core fiber photonics

Project Details


Unlike traditional optical fibers that use a single core as communication channel, multi-core fibers can transmit information through numerous channels within the same volume. They therefore have a larger data-transmission capacity and hence they are considered for replacing traditional fibers in optical communication networks. Current solutions to manipulate the optical signals transmitted through multi-core fibers require first connecting each of the cores to a standard single core fiber, second processing those signals with traditional individual components and third reconnecting the individual fibers back to the multi-core fiber. The solution I propose is to fabricate those components, such as directional couplers that split the signal from the central core to surrounding cores, directly in the volume of the multi-core fiber. By focusing a femtosecond laser pulse inside the glass fiber, one can ‘write’ highly localized material modifications to create waveguides that connect two exiting cores to each other and hence to form an all-fiber coupling structure. To enable such functionality in a multi-core fiber I will greatly enhance the properties of laser inscribed waveguides in optical fibers and I will introduce dynamic manipulation of the
femtosecond pulsed laser beam properties during fabrication of these coupling structures. By doing so I will be able to deliver new high- performance devices for applications in optical communications and optical fiber-based metrology.
Effective start/end date1/10/1931/12/22

Flemish discipline codes in use since 2023

  • Optical fibre communications


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