Lyot filter based multiwavelength fiber ring laser actively mode-locked at 10 GHz using an electroabsorption modulator |
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| Authors: | Colm O&rsquo Riordan,Michael J. Connelly,Liam P. Barry |
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| Affiliation: | a Optical Communications Research Group, Department of Electronic and Computer Engineering, University of Limerick, Limerick, Ireland
b Radio and Optical Communications Group, Research Institute for Networks and Communications Engineering, School of Electronic Engineering, Dublin City University, Dublin 9, Ireland |
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| Abstract: | A multiwavelength fiber ring laser comprising of a Lyot filter and hybrid gain medium is presented. A wavelength channel spacing of 100 GHz is achieved by appropriate tuning of the Lyot filter length. Four wavelength channels are simultaneously mode-locked at 10 GHz using an electroabsorption modulator. We highlight how the intra-cavity modulator can affect the stability of the mode-locked laser spectrum when used in conjunction with a Lyot filter. We show that, due its reduced polarization sensitivity, an electroabsorption modulator significantly improves the stability of the mode-locked laser spectrum when compared to using a Mach-Zehnder modulator. |
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| Keywords: | Electroabsorption modulator Lyot filter Mach-Zehnder modulator Mode-locked lasers Wavelength division multiplexing |
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