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The performance of high-brightness laser diode emitters and bars is often affected by external optical feedback from the modules and systems in which they are deployed. We report on the coupling of an advanced simulation tool for highbrightness laser diodes with commercial optical design software. The aim of this work is to create a software tool which can be applied to the design and optimisation of high-brightness diode laser modules and systems intended for use in industrial applications requiring the cutting and welding of sheet metal.

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

Abstract-This paper presents a model for simulating the impact of external optical feedback on large-optical cavity highbrightness diode lasers. The simulations are performed with our 2.5D simulation tool for high-brightness laser diodes. The external cavity is modelled using commercial coherent ray tracing software. We consider the impact of the optical feedback on the excitation of amplified spontaneous emission in the parasitic vertical modes.