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https://hdl.handle.net/2440/53540
2024-03-29T15:49:39ZCorrosion sensing of aluminium alloys using exposed-core microstructured optical fibres
https://hdl.handle.net/2440/86194
Title: Corrosion sensing of aluminium alloys using exposed-core microstructured optical fibres
Author: Warren-Smith, S.C.; Ebendorff-Heidepriem, H.; Afshar, S.V.; Monro, T.M.; McAdam, G.; Davis, C.
Abstract: We report on recent work towards the development of a novel method for sensing the corrosion of aluminium alloys. This method involves measuring the presence of aluminium ions, a by-product of corrosion, using a new class of exposed-core microstructured optical fibres (MOFs) via fluorescence-based methods. This work builds on previous research where conventional optical fibres were utilised specifically for aluminium ion detection via the ultraviolet excitation of 8-hydroxyquinoline, an organic molecule that fluoresces when complexed with aluminium ions. Here we present modelling results and report on the initial fabrication of a new class of MOF which has a micron-scaled core that is partially exposed allowing for a direct interaction between the evanescent field and the sensing environment. Modelling results demonstrate that such fibres can provide both a strong interaction between the guided light and the material to be sensed, as well as efficient capture of the emitted fluorescence into the guided modes of the fibre. These optical fibres are fabricated from a soft-glass (lead-silicate) and thus preform fabrication can be achieved via extrusion. This allows complex structures to be fabricated, such as the large holes and micron-scaled core of the fibre design considered here. In this work we focus on using the organic dye lumogallion for fluorescence-based aluminium ion detection and show initial experimental results demonstrating proof-of-concept.2008-01-01T00:00:00ZA high efficiency low threshold erbium-doped holey optical fiber laser
https://hdl.handle.net/2440/59486
Title: A high efficiency low threshold erbium-doped holey optical fiber laser
Author: Furusawa, K.; Sahu, J.; Monro, T.; Richardson, D.
Abstract: We report the first continuous wave operation of an erbium doped holey fiber laser with a slope efficiency as high as 57.3%, and with an absorbed pump power threshold as low as 0.55mW.2003-01-01T00:00:00Z24 channels x 10 GHz multiwavelength pulse source based on supercontinuum generation in highly nonlinear holey fiber
https://hdl.handle.net/2440/59408
Title: 24 channels x 10 GHz multiwavelength pulse source based on supercontinuum generation in highly nonlinear holey fiber
Author: Yusoff, Z.; Teh, P.; Petropoulos, P.; Furusawa, K.; Belardi, W.; Monro, T.; Richardson, D.
Abstract: We demonstrate a multiwavelength pulse source which utilizes supercontinuum generated in a normally dispersive holey fiber and spectral slicing in an arrayed waveguide grating. All channels exhibit almost constant pulse width and excellent noise properties, as verified by bit-error-rate measurements.2003-01-01T00:00:00ZHoley fibre based nonlinear optical devices for telecommunications
https://hdl.handle.net/2440/59407
Title: Holey fibre based nonlinear optical devices for telecommunications
Author: Lee, J.; Belardi, W.; Monro, T.; Richardson, D.
Abstract: The wavelength-scale features in holey fibers lead to novel properties including endlessly single-mode guidance, high optical nonlinearity. The state-of-the-art HF technology for nonlinear optical signal processing devices is reviewed from a viewpoint of possible applications for telecommunications.2003-01-01T00:00:00Z