| CHEN Fu-ping,SHAO Yu-feng,CHEN Lao,SHEN Shi-lu,WANG An-rong,LUO Ying-xiang,ZHAO Yun-jie.Study on RZ-4PAM downstream signals with duty cycles of 33% and 50% for optical access system application[J].Optoelectronics Letters,2017,13(1):63-66 |
| Study on RZ-4PAM downstream signals with duty cycles of 33% and 50% for optical access system application |
| Author Name | Affiliation | | CHEN Fu-ping | College of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing 404100, China | | SHAO Yu-feng | College of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing 404100, China | | CHEN Lao | College of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing 404100, China | | SHEN Shi-lu | College of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing 404100, China | | WANG An-rong | College of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing 404100, China | | LUO Ying-xiang | College of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing 404100, China | | ZHAO Yun-jie | College of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing 404100, China |
|
| Abstract: |
| 4-ary pulse amplitude modulation (4PAM) signals with 33% and 50% return-to-zero (RZ) clocks are generated for passive optical network (PON). We demonstrate that RZ-4PAM signals with duty cycles of 33% and 50% after transmission over 20-km-long single mode fiber (SMF) at 10 Gbit/s can be directly detected by using one photo detector, and the original data can also be restored by one M-ary threshold detector and one 4PAM sequence decoder. The optical spectra of 33% and 50% RZ-4PAM signals are measured, and their eye-diagrams before and after transmission are also analyzed. Simulation results show that 33% and 50% RZ-4PAM downlink signals can be received effectively, and the received power values are ?15.1 dBm and ?13.8 dBm when the bit error rate (BER) is 10-6. Moreover, 33% RZ-4PAM optical signals have better reception performance than 50% RZ-4PAM optical signals. |
| Hits: 3618 |
| Download times: 0 |
|
| View Full Text Download reader |
|
|
|
