All-optical switching based on optical fibre long period gratings modified bacteriorhodopsin

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dc.contributor.authorKorposh, Sergiy
dc.contributor.authorJames, Stephen
dc.contributor.authorPartridge, Matthew
dc.contributor.authorSichka, M
dc.contributor.authorTatam, Ralph P.
dc.date.accessioned2017-12-20T18:31:59Z
dc.date.available2017-12-20T18:31:59Z
dc.date.issued2017-11-24
dc.description.abstractAll-optical switching using an optical fibre long-period gating (LPG) modified with bacteriorhodopsin (bR) is demonstrated. The switching process is based on the photo-induced RI change of bR, which in turn changes the phase matching conditions of the mode coupling by the LPG, leading to modulation of the propagating light. The effect was studied with an LPG immersed into a bR solution and with LPGs coated with the bR films, deposited onto the LPGs using the layer-by-layer electrostatic self-assembly (LbL) method. The dependence of the all-optical switching efficiency upon the concentration of the bR solution and on the grating period of the LPG was also studied. In addition, an in-fibre Mach-Zehnder interferometer (MZI) composed of a cascaded LPG pair separated by 30 mm and modified with bR was used to enhance the wavelength range of all-optical switching. The switching wavelength is determined by the grating period of the LPG. Switching efficiencies of 16% and 35% were observed when an LPG and an MZI were immersed into bR solutions, respectively. The switching time for devices coated with bR-films was within 1 s, 10 times faster than that observed for devices immersed into bR solution.en_UK
dc.identifier.citationKorposh S, James S, Partridge M, Sichka M, Tatam R, All-optical switching based on optical fibre long period gratings modified bacteriorhodopsin, Optics and Laser Technology, Vol. 101, May 2018, pp. 162-171en_UK
dc.identifier.issn0030-3992
dc.identifier.urihttp://dx.doi.org/10.1016/j.optlastec.2017.11.021
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/12814
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International*
dc.rightsAttribution 4.0 International (CC BY 4.0) You are free to: Share — copy and redistribute the material in any medium or format Adapt — remix, transform, and build upon the material for any purpose, even commercially. The licensor cannot revoke these freedoms as long as you follow the license terms. Under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Information: No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectAll-optical switchingen_UK
dc.subjectBacteriorhodopsin (bR)en_UK
dc.subjectOptical fibreen_UK
dc.subjectMach-Zehnder interferometeren_UK
dc.subjectLong period gratingsen_UK
dc.titleAll-optical switching based on optical fibre long period gratings modified bacteriorhodopsinen_UK
dc.typeArticleen_UK

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