本篇論文致力於研究單向與雙向傳輸之分波多工被動光網路兼具安全性監控技術，點對點光纖網路距離約為25 km，在網路節點採用陣列波導光柵當作訊號多工以及解多工之元件，可增加頻寬、節省在長距離傳輸下所需的光纖以及降低插入損失。

為了加入監測系統，首先建立雙向傳輸的光纖網路，在傳輸訊號方面，主要傳輸訊號為1580 nm~1587 nm的L-band光源，局端以及用戶端分別使用了1580.5 nm~1585.7 nm與1581.3 nm~1586.4 nm間距為1.6 nm的4個波長訊號進行雙向傳輸，確認系統可正常運作後，再加入光時域反射儀進行監測測試，所使用的監測訊號為1535 nm ~ 1550 nm 的C-band寬頻譜光源，其結果為可同時監測四個不同的用戶端網路線路存活情況，並在具有監測系統下進行其單向以及雙向的誤碼率測試，其結果在誤碼率為10-9的標準下，功率償付值約為0.5 dB，在可接受的範圍之中。

其次為了補償光訊號在經過長距離傳輸時的損耗，採用遠端泵激光源的方式進行訊號放大，其放大訊號的泵激光源為1480nm的波長，並將摻鉺光纖放置在距離泵激光源12 km處，並在實驗架構分別使用了2、4、5、6公尺的摻鉺光纖進行分析，最後發現在泵激光源為200 mW經過一段距離傳輸之後剩餘75 mW時，5公尺的摻鉺光纖可達到最大的增益輸出，並對於其傳輸效果進行單向以及雙向的誤碼率測試，測量的功率償付值約為0.64 dB。
最後將監控系統以及採用遠端泵激光源做訊號放大方式做結合，完成了在傳輸速率為10 Gb/s的雙向傳輸被動光網路並同時可監測光纖網路的線路安全架構。

In this thesis, we studied on unidirectional and bidirectional transmission wavelength division multiplexing passive optical networks (WDM-PONs). The transmission distances for various experiments are approximately 25-35 km in each case. There are included various devices in bidirectional WDM PONs. For example, the array waveguide gratings, fiber Bragg gratings and thin film filters, and optical amplifier. Also, bidirectional WDM PON provides WDM characteristics and save the fiber.

For setting of monitoring system, we established bidirectional transmission WDM PON. The wavelengths for transmission ranges are from 1580 nm to 1587 nm in L-band with channel spacing of 1.6 nm. After verified the proposed system, we added optical time domain reflectormeter (OTDR) for monitoring purpose. The built-in light source for the OTDR is a C-band broadband source ranges 1535 nm ~ 1550 nm. Four optical network units (ONUs) could be simultaneously monitored. The bit error rate (BER) performances were also measured and we found that the power penalty is less than 0.6 dB at 10-9 BER.

In order to compensate for signals loss when transmission distance in extended, we used a remotely pumped laser diode to excite erbium-doped fiber for signals amplification. The pump wavelength is at 1480 nm and the distance between pump laser source and erbium-doped fiber (EDF) is 12 km. Experimental setup was implemented by using 2, 4, 5, and 6 m erbium-doped fibers in each case for analyses and comparison. Using remotely pumped, the power penalty is about 0.64 dB, which is still in an acceptable range.

Finally, we integrated remotely pumped amplifier and OTDR monitoring functions in a bidirectional WDM PON system with good performance. With merit of double transmission capacity, this system is promising for future WDM PONs application.

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