This document may be downloaded, read, stored and printed for your own use within the limits of § 53 UrhG but it may not be distributed via the internet or passed on to external parties.Dieses Dokument darf im Rahmen von § 53 UrhG zum eigenen Gebrauch kostenfrei heruntergeladen, gelesen, gespeichert und ausgedruckt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.Radziunas, MindaugasKhoder, MulhamTronciu, VasileDanckaert, JanVerschaffelt, Guy2017-11-142019-06-2820172198-5855https://doi.org/10.34657/3432https://oa.tib.eu/renate/handle/123456789/2449We study experimentally and theoretically a semiconductor ring laser with four filtering channels providing filtered delayed optical feedback. To describe and analyze the wavelength selection and tuning in this device, we exploit the traveling-wave model determining the evolution of optical fields and carrier density along the ring cavity and filtering branches. The numerical results agree with the experimental observations: we can reproduce the wavelength tuning, the multiple wavelength emission, and the wavelength switching speed measured in these devices. The traveling-wave model allows us to study in detail the effect of the different laser parameters and can be useful for designing the future devices.application/pdfeng510Semiconductor ring lasersoptical feedbackwavelength filteringtunable laserstraveling wave modellongitudinal modesmode switchingReport