Dr Steve Bull's Outputs (5)

Highly sensitive optical fibre Bragg grating contact pressure sensor embedded in a polymer layer: modelling and experimental validation (2024)
Journal Article
Abeywardena, C., Zhang, Q., Korposh, S., Morgan, S., Bull, S., & Correia, R. (2024). Highly sensitive optical fibre Bragg grating contact pressure sensor embedded in a polymer layer: modelling and experimental validation. Results in Optics, 14, Article 100604. https://doi.org/10.1016/j.rio.2024.100604

This paper discusses mathematical modelling and experimental validation of a highly sensitive optical fibre Bragg grating (FBG) contact pressure sensor developed for healthcare applications. Bare FBGs are not very sensitive to pressure (~ 3x10-3 nm/M... Read More about Highly sensitive optical fibre Bragg grating contact pressure sensor embedded in a polymer layer: modelling and experimental validation.

Self-consistent simulation of high-brightness diode lasers with external optical feedback (2015)
Presentation / Conference Contribution
Helal, M. A., Bull, S., Kaunga-Nyirenda, S. N., Lim, J. J., & Larkins, E. C. (2015, October). Self-consistent simulation of high-brightness diode lasers with external optical feedback. Presented at Proceedings of the 2015 High Power Diode Lasers and Systems Conference, HPD 2015 - Co-located with Photonex 2015, Coventry, United Kingdom

© 2015 IEEE. This paper presents a model for simulating the impact of external optical feedback on large-optical cavity high-brightness diode lasers. The simulations are performed with our 2.5D simulation tool for high-brightness laser diodes. The ex... Read More about Self-consistent simulation of high-brightness diode lasers with external optical feedback.

Design Optimisation of High-Brightness Laser Diodes for External Cavity Operation in the BRIDLE Project (2014)
Presentation / Conference Contribution
Larkins, E., Bull, S., Kaunga-Nyirenda, S., Helal, M., Vilokkinen, V., Uusimaa, P., Crump, P., & Erbert, G. (2014, September). Design Optimisation of High-Brightness Laser Diodes for External Cavity Operation in the BRIDLE Project. Presented at 2014 International Semiconductor Laser Conference (ISLC), Palma de Mallorca, Spain

We report on the design aspects of high performance diode lasers for application in high-brightness spectral beam combining and coherent beam combining modules. Key performance trade-offs are identified and potential solutions are explored.

Design and simulation of high-speed nanophotonic electro-optic modulators (2014)
Presentation / Conference Contribution
Kaunga-Nyirenda, S. N., Dias, H. K., Lim, J. J., Bull, S., Malaguti, S., Bellanca, G., & Larkins, E. C. (2014, September). Design and simulation of high-speed nanophotonic electro-optic modulators. Presented at 14th International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD 2014), Palma de Mallorca

In this work, an ultracompact electro-optic modulator based on refractive index modulation by plasma dispersion effect in PhC all-optical gate (AOG) is proposed. The index modulation is achieved by applying a time-varying bias voltage across the elec... Read More about Design and simulation of high-speed nanophotonic electro-optic modulators.

Factors influencing brightness and beam quality of conventional and distributed Bragg reflector tapered laser diodes in absence of self-heating (2014)
Journal Article
Kaunga-Nyirenda, S. N., Bull, S., Lim, J. J., Hasler, K.-H., Fricke, J., & Larkins, E. C. (2014). Factors influencing brightness and beam quality of conventional and distributed Bragg reflector tapered laser diodes in absence of self-heating. IET Optoelectronics, 8(2), https://doi.org/10.1049/iet-opt.2013.0082

In this study, the authors examine some of the factors affecting the brightness and the beam quality of high-power tapered lasers. The large volume resonators required to achieve a high-power, high-brightness operation make the beam quality sensitive... Read More about Factors influencing brightness and beam quality of conventional and distributed Bragg reflector tapered laser diodes in absence of self-heating.