A 52 m/9 Gb/s four-level pulse amplitude modulation（PAM4） plastic optical fiber（POF）-underwater wireless laser transmission（UWLT） convergence with a laser beam reducer is proposed. A 52 m/9 Gb/s PAM4 POFUWLT con...A 52 m/9 Gb/s four-level pulse amplitude modulation（PAM4） plastic optical fiber（POF）-underwater wireless laser transmission（UWLT） convergence with a laser beam reducer is proposed. A 52 m/9 Gb/s PAM4 POFUWLT convergence is practically demonstrated with the application of a laser beam reducer to reduce the collimated beam diameter. A 50 m graded-index（GI）-POF is employed as an underwater extender to efficiently enhance the coverage of UWLT. The performances of PAM4 POF-UWLT convergence in view of bit error rate（BER） and eye diagrams improve with the decrease of the collimated beam diameter because of the small amount of light absorbed by clear ocean water. Competent BER and eye diagrams（three independent eye diagrams） are achieved over a 50 m GI-POF transmission with a 2 m clear ocean water link.展开更多
在激光无线能量传输中,由于瞄准系统误差和物体遮挡的影响,光电池阵列接收到的激光辐照分布不均匀,导致光电池阵列组串内的电池间出现电流失配,输出功率下降。针对该问题,采用分布式最大功率点追踪(Distributed Maximum Power Point Tra...在激光无线能量传输中,由于瞄准系统误差和物体遮挡的影响,光电池阵列接收到的激光辐照分布不均匀,导致光电池阵列组串内的电池间出现电流失配,输出功率下降。针对该问题,采用分布式最大功率点追踪(Distributed Maximum Power Point Tracking,DMPPT)技术,减少光电池阵列组串内的电池间电流失配,并用并联型Boost(PT-Boost)电路替代传统Boost电路,降低DC/DC转换器的输入电流纹波,使DMPPT系统获得高追踪效率。实验结果表明,相较于传统Boost电路,PT-Boost电路的追踪效率提高3.6%,达到93.5%。在上述研究的基础上,设置了遮光率分别为0%、25%和50%的激光无线能量传输场景,DMPPT系统整体效率分别达到了93%、92.6%和90.3%。该研究结果对激光辐照不均匀场景下激光无线能量传输的最大功率点追踪指导意义。展开更多
基金the financial support from the Ministry of Science and Technology of Taiwan, China (Nos. MOST 104-2221-E-027-072-MY3 and MOST 106-2221-E-027-073)
文摘A 52 m/9 Gb/s four-level pulse amplitude modulation（PAM4） plastic optical fiber（POF）-underwater wireless laser transmission（UWLT） convergence with a laser beam reducer is proposed. A 52 m/9 Gb/s PAM4 POFUWLT convergence is practically demonstrated with the application of a laser beam reducer to reduce the collimated beam diameter. A 50 m graded-index（GI）-POF is employed as an underwater extender to efficiently enhance the coverage of UWLT. The performances of PAM4 POF-UWLT convergence in view of bit error rate（BER） and eye diagrams improve with the decrease of the collimated beam diameter because of the small amount of light absorbed by clear ocean water. Competent BER and eye diagrams（three independent eye diagrams） are achieved over a 50 m GI-POF transmission with a 2 m clear ocean water link.
文摘在激光无线能量传输中,由于瞄准系统误差和物体遮挡的影响,光电池阵列接收到的激光辐照分布不均匀,导致光电池阵列组串内的电池间出现电流失配,输出功率下降。针对该问题,采用分布式最大功率点追踪(Distributed Maximum Power Point Tracking,DMPPT)技术,减少光电池阵列组串内的电池间电流失配,并用并联型Boost(PT-Boost)电路替代传统Boost电路,降低DC/DC转换器的输入电流纹波,使DMPPT系统获得高追踪效率。实验结果表明,相较于传统Boost电路,PT-Boost电路的追踪效率提高3.6%,达到93.5%。在上述研究的基础上,设置了遮光率分别为0%、25%和50%的激光无线能量传输场景,DMPPT系统整体效率分别达到了93%、92.6%和90.3%。该研究结果对激光辐照不均匀场景下激光无线能量传输的最大功率点追踪指导意义。
