Investigation on performance of all optical buffer with large dynamical delay time based on cascaded double loop optical buffers |
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Authors: | Wang Yong-Jun Wu Chong-Qing Xin Xiang-Jun Yu Kuang-Lu and Zhang Xiao-Lei |
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Abstract: | Optical buffers are critical for optical signal processing in future optical packet-switched networks. In this paper, a theoretical study as well as an experimental demonstration on a new optical buffer with large dynamical delay time is carried out based on cascaded double loop optical buffers (DLOBs). It is found that pulse distortion can be restrained by a negative optical control mode when the optical packet is in the loop. Noise analysis indicates that it is feasible to realise a large variable delay range by cascaded DLOBs. These conclusions are validated by the experiment system with 4-stage cascaded DLOBs. Both the theoretical simulations and the experimental results indicate that a large delay range of 1--9999 times the basic delay unit and a fine granularity of 25 ns can be achieved by the cascaded DLOBs. The performance of the cascaded DLOBs is suitable for the all optical networks. |
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Keywords: | all optical packets switching optical buffer with large delay range signals impairment noise analysis of semiconductor optical amplifier |
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