Controlling the Cross-section of Ultrafast Laser Inscribed Optical Waveguides

Robert R. Thomson, Nicholas D. Psaila, Henry T. Bookey, Derryck T. Reid, Ajoy K. Kar

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

11 Citations (Scopus)


The refractive index profile, or cross-section, of an optical waveguide is its most defining property. It directly determines the number of transverse modes supported by the waveguide and the properties of these modes. Proper control of the waveguide cross-section is therefore essential if the performance of the waveguide, or waveguide device, is to be optimised. This chapter describes how the waveguide cross-section affects the properties of the guided modes, why it is important to control the waveguide cross-section from a device engineering point of view and the various experimental techniques that have been developed to control the cross-section of ultrafast laser inscribed waveguides.

Original languageEnglish
Title of host publicationTopics in Applied Physics
Subtitle of host publicationFemtosecond Laser Micromachining : Photonic and Microfluidic Devices in Transparent Materials
EditorsRoberto Osellame, Giulio Cerullo, Roberta Ramponi
Place of PublicationBerlin
Number of pages33
ISBN (Electronic)9783642233661
ISBN (Print)9783642233654
Publication statusPublished - 2012


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