Eleven-wavelength switchable fiber ring laser with a dispersion compensation fiber and a delayed interferometer |
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Authors: | Fei Wang Xin-Liang Zhang Jian-Ji Dong Zheng Zhang |
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Institution: | a Wuhan National Laboratory for Optoelectronics and School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China b School of Mathematics and Physics, Chongqing Institute of Technology, Chongqing 400050, China |
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Abstract: | We demonstrate a fiber ring laser with a dispersion compensation fiber (DCF) and a delayed interferometer (DI) with temperature control, which is able to switch eleven wavelengths one by one. In ring cavity, DCF supplies different effective cavity lengths for different wavelengths, DI generates a wavelength comb corresponding to the ITU grid, a flat-gain erbium-doped fiber amplifier (EDFA) provides uniform gain for each lasting wavelength, and a semiconductor optical amplifier (SOA) not only acts as active modulator, but also alleviates homogeneous broadening effect of EDFA. Stable pulse trains with a pulsewidth about 40 ps at 10 GHz have been obtained by injecting external optical control signals into the laser. Wavelength switching process among eleven wavelengths is achieved by merely tuning an intracavity optical delay line. |
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Keywords: | Optical communications Wavelength switchable lasers Mode-locked lasers Semiconductor optical amplifier |
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