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 & Francis Open

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 AmplifiersTaylor & Francis

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., …Larkins, E. (2015). Separate phase-locking and coherent combining of two laser diodes in a Michelson cavity. In High-Power Diode Laser Technology and Applications XIII. https://doi.org/10.1117/12.2079314

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., …Erbert, G. (2014). Design Optimisation of High-Brightness Laser Diodes for External Cavity Operation in the BRIDLE Project. In 2014 International Semiconductor Laser Conference. https://doi.org/10.1109/islc.2014.143

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.

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.

Design and simulation of high-speed nanophotonic electro-optic modulators
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.

Self-consistent simulation of high-brightness diode lasers with external optical feedback
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.

High-power operation of coherently coupled tapered laser diodes in an external cavity
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.