Abstract
SOA and EDFA were compared as an upstream link extender on the bidirectional TDM–PON system for 256 ONUs of 2.5Gb/s and 50km transmission. The total power budget of this uplink was 58dB with an extender gain of 25dB. As the input power to the extender was changed from −30dBm to 0dBm, burst signals with and without preamble bits were compared. This gave quantitative analysis of the signal aggravation that was caused by the burst effect. The comparison experiment showed that the links using SOA and EDFA extenders had input power dynamic ranges of 15dB and 10dB respectively from −30dBm without burst effect control. So, it presents a practical possibility for the usage of link extenders on the extended PON link without burst effect control.
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