All Outputs (9)

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.

High-brightness laser diodes with external feedback (2017)
Book Chapter
Helal, M. A., Kaunga-Nyirenda, S. N., Bull, S., & Larkins, E. (2017). High-brightness laser diodes with external feedback. In J. Piprek (Ed.), Handbook of Optoelectronic Device Modeling and Simulation. Vol. 2. Lasers, Modulators, Photodetectors, Solar Cells, and Numerical Methods,. Taylor and Francis

Wave mixing effects in semiconductor optical amplifiers (2017)
Book Chapter
Kaunga-Nyirenda, S. N., Dlubek, M., Lim, J. J., Bull, S., Phillips, A., Sujecki, S., & Larkins, E. (2017). Wave mixing effects in semiconductor optical amplifiers. In J. Piprek (Ed.), Handbook of Optoelectronic Device Modeling and Simulation. Vol. 1. Fundamentals, Materials, Nanostructures, LEDs, and Amplifiers. Taylor and Francis

High-power operation of coherently coupled tapered laser diodes in an external cavity (2016)
Presentation / Conference Contribution
Schimmel, G., Doyen, I., Janicot, S., Hanna, M., Georges, P., Lucas-Leclin, G., Decker, J., Crump, P., Erbert, G., Kaunga-Nyirenda, S., Moss, D., Bull, S., Larkins, E., Witte, U., & Traub, M. High-power operation of coherently coupled tapered laser diodes in an external cavity. Presented at High-Power Diode Laser Technology and Applications XIV, San Francisco, California, USA

We demonstrate a rear-side phase-locking architecture with two high-brightness diode lasers. This technique is based on the passive phase-locking of emitters in an external cavity on their rear facet, and their coherent combination on the front facet... Read More about High-power operation of coherently coupled tapered laser diodes in an external cavity.

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.

Separate phase-locking and coherent combining of two laser diodes in a Michelson cavity (2015)
Presentation / Conference Contribution
Schimmel, G., Doyen, I., Janicot, S., Ramirez, L., Hanna, M., Georges, P., Lucas-Leclin, G., Vilokkinen, V., Melanen, P., Uusimaa, P., Decker, J., Crump, P., Erbert, G., Bull, S., Kaunga-Nyirenda, S., & Larkins, E. Separate phase-locking and coherent combining of two laser diodes in a Michelson cavity. Presented at High-Power Diode Laser Technology and Applications XIII

We describe a new coherent beam combining architecture based on passive phase-locking of two laser diodes in a Michelson external cavity on their rear facet, and their coherent combination on the front facet. As a proof-of-principle, two ridge lasers... Read More about Separate phase-locking and coherent combining of two laser diodes in a Michelson cavity.

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.