Beat signal compression by loop mirror constructed with linear dispersion decreasing fiber |
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| Authors: | Ai-ling Zhang Chang-xiu Li and Yu-long Zhang |
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| Institution: | 12357. Key Lab. of Film Electronics and Communication Devices of Tianjin, Communications Devices and Technology Engineering Research Center of Education Ministry of China, School of Computer and Communication Engineering, Tianjin University of Technology, Tianjin, 300384, China
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| Abstract: | A nonlinear optical loop mirror (NOLM) constructed with linear dispersion decreasing fiber (DDF) is used to compress a beat signal. Several factors impacting on quality of output pulse in this compression system, such as dispersion slope of DDF, power-splitting ratio, incident pulse shape and peak power, are analyzed numerically. The new method for selecting device characteristics is adopted to enable both good pedestal suppression and pulse compression. As a result, the output pulse train with tunable and high repetition rate, pedestal energy of 5.09%, compression ratio of 25.6 and energy transmissivity of 50.56% is obtained by using 0.524 km-long DDF with dispersion slope of 26 ps2/km2 and a coupler with power-splitting ratio of 0.54. |
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