本論文提出一植基於自發放射光源與遠端泵激之分波多工被動光網路系統，並提供了上下行各2.5Gb/s雙向傳輸。此架構利用自發放射光源取代傳統使用的雷射陣列光源當作上行和下行訊號光源，將寬頻譜光源在局端與遠端利用既有分波多工被動光網路架構中的分波多工器將自發放射光源做頻譜分配，並將其調變；而在用戶端使用反射式調變器將上行光源載上訊號，為達到雙向傳輸距離25公里，必須利用大有效面積光纖(LEAF)來降低色散效應對系統的影響。
由於自發放射光源提供每一通道的功率較低，再加上被動元件及調變造成的功率損失，因此，利用遠端泵激架構特性，在遠端補償光路損失，且可提升上下行傳輸的訊雜比。實驗結果顯示，利用自發放射光源作為上下行光源可達到上下行各8個通道具有2.5Gb/s之雙向傳輸，且傳輸25公里，其誤碼率可達10-9之程度。

We propose and experimentally demonstrate the design of a remotely pumped WDM-PON architecture to provide 2.5-Gb/s bidirectional transmission with potential low-cost configuration. In this scheme, we use amplified spontaneous emission (ASE) light source with broad optical spectrum for downstream and upstream transmission. The ASE light source spectrum is sliced by the arrayed waveguide grating (AWG) at the central office (CO) and remote node (RN) and each spectrum slice is used to carrier the signal of a downstream or upstream channel. A reflected electro-absorption modulator (REAM) is used to encode the upstream signals and achieve colorless operation. An electro-absorption modulator (EAM) is used to encode the downstream signals. In order to achieve a transmission up to 25 km distance, a low-dispersion fiber like a larger effective area fiber (LEAF) is used to reduce the dispersion effect.
Due to the low power density of ASE source and the insertion loss caused by passive components and modulation, a remotely pumped erbium-doped fiber amplifier (RP-EDFA) is employed to provide extra gain to both downstream signals and upstream signals. The RP-EDFA can compensate the propagation loss and spectral slicing loss. The experimental results show that the downstream and upstream transmission of 2.5Gb/s data rate for each 8 channels can achieve a bit error rate (BER) of lower than 10-9 over 25 km of distance.

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