本論文探討在複合光被動網路系統架構中傳輸高速訊號的可行性與限制，此複合架構可同時包含分時多工、分波多工和分時分波多工三種被動光網路的運作模式。此架構主要優點是可對用戶端進行分級，可依用戶需求去做調整和分配。我們探討在不同運作模式下經20 km標準單模光纖傳輸，對用戶數及功率需求的配置。如利用放大器來補償經過各元件及傳輸的損耗，在架構上可實現TDM/TWDM傳輸25 Gb/s的NRZ，WDM可傳輸50 Gb/s的NRZ，且依目前市售元件規格，最多可提供TWDM和TDM 1024個用戶端且WDM具有15個高速用戶端。
為使被動光網路具有更高速的傳輸品質，良好的光發射機尤其重要，在本論文中量測兩種光發射機分別為單顆封裝驅動晶片以及QSFP-DD模組，皆採用400GBASE-LR8標準，搭載28Gbaud/s的高速PAM-4訊號，於B2B傳輸光眼圖時，誤碼率達1.11x10-9，且TDECQ值低達1.26，經接收端補償效應後，誤碼率改善至2.47x10-10，並於單模光纖中傳輸20 km時經接收端補償後，誤碼率可達8.49x10-6，皆可達使用FEC前的誤碼率標準，因其具備高速及可長公里傳輸特性，將來勢必可和被動光網路應用作結合，提供更高的傳輸品質。

We investigated here the feasibility and limitation of a Hybrid-PON system for transmitting 25-Gb/s and above data rates. The hybrid system structure includes three different modes of operation: Time Division Multiplexing (TDM), Wavelength Division Multiplexing (WDM), and Time and Wavelength Division Multiplexing (TWDM) Passive Optical Networks (PONs). The main advantage of this architecture is that the user terminal side can be easy graded, adjusted and allocated, according to the user requirements. The number of users and the required power for transmission over 20 km single-mode fiber (SMF) at different operation modes has been discussed. If the optical amplifiers is used to compensate the loss, the TDM/TWDM mode can be realized to transmit 25 Gb/s NRZ, while the WDM mode can transmit 50 Gb/s NRZ, and according to the current system specifications, TWDM and TDM can support 1024 users whereas the WDM can provide 15 high speed users.
In order to verify the high-data-rate transmission, the quality of optical transmitters is especially important. In this work, we measured two the performance of Linear Quad EML Driver and an 8-channel QSFP-DD, transceiver which are based on the 400GBASE-LR8 standard for transmitting 28-Gbaud/s PAM-4 signals. The bit error rate is 1.11x10-9 for back-to-back (B2B) transmission, and the TDECQ value is as low as 1.26. With the equalization and compensation effect at the receiver, the bit error rate can be improved to 2.47x10-10. After transmitting through 20 km long SMF with receiver compensation, the bit error rate can reach 8.49×10-6. All of the above results can meet the bit error rate requirement of receivers with forward error correcting (FEC). With the high-speed and long-distance transmission characteristics, the receivers are feasible for applications in the hybrid PONs to improve overall transmission quality.

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