C. Yeh, Yen-Liang Liu, Y. Liu, C. Chow, Hsing-Yu Chen
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Adaptive power adjustment of upstream traffic for energy-saving PON access
Here, we first propose to adjust adaptively the output optical power of the upstream laser diode (LD) depending on the different fiber lengths. With the different fiber transmission lengths, we can properly adjust the bias current and modulation index of upstream LD for energy-saving. We characterize and analyze experimentally the relationship of output optical power and modulation amplitude Vamp under different fiber transmissions in PON access. Moreover, due to the adaptive power control of upstream signal, the optical upstream equalization also can be retrieved with power variation of 1.1 dB in this experiment.
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