Tunable semiconductor ring laser with filtered optical feedback: Traveling wave description and experimental validation
- Radziunas, Mindaugas
- Khoder, Mulham
- Tronciu, Vasile
- Danckaert, Jan
- Verschaffelt, Guy
2010 Mathematics Subject Classification
- 78A60 35Q60 78-05, 78-04
2008 Physics and Astronomy Classification Scheme
- 42.55.Px, 42.60.Da, 42.60.Fc, 42.65.Pc, 42.65.Sf, 02.30.Jr, 02.60.Cb
- Semiconductor ring lasers, optical feedback, wavelength filtering, tunable lasers, traveling wave model, longitudinal modes, mode switching
We 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.
- J. Opt. Soc. Amer. B Opt. Phys., 35, pp. 380--390, DOI 10.1364.JOSAB.35.000380 .