Wavelength-spacing continuously tunable multi-wavelength SOA-fiber ring laser based on Mach–Zehnder interferometer |
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| Authors: | Daru R Chen Hongyan Fu Haiyan Ou Shan Qin |
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| Institution: | aCentre for Optical and Electromagnetic Research, Zijingang Campus, Zhejiang University, Hangzhou 310058, China;bJoint Research Center of Photonics, Royal Institute of Technology (Sweden) and Zhejiang University, Zijingang Campus, Hangzhou 310058, China |
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| Abstract: | A Mach–Zehnder interferometer (MZI) which is used as a wavelength-spacing tunable comb filter in a fiber ring laser is built by employing an optical variable delay line (OVDL). Stable multi-wavelength semiconductor optical amplifier (SOA)-fiber ring laser based on an SOA and the MZI comb filter is achieved. Wavelength spacing can be continuously tuned by adjusting the OVDL and, as an example, multi-wavelength lasing with the wavelength spacing of 0.4, 0.8, or 1.6 nm is demonstrated. The output of the proposed multi-wavelength SOA-fiber ring laser is quite stable at room temperature and the output spectrum can be adjusted by controlling the bias current of the SOA. |
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| Keywords: | Fiber laser Semiconductor optical amplifier Mach– Zehnder interferometer |
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