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提出了解复用窗口匹配滤波器的概念,分析了利用光带通滤波器提高光时分复用(OTDM)频谱效率的光谱压缩技术。基于自制的40Gb/sOTDM复用器,采用电吸收调制器(EAM)及时钟提取模块组成的反馈环路解复用模块,以阵列波导光栅(AWG)作为电吸收采样窗口(EASW)的匹配滤波器对4×10Gbit/sOTDM信号进行光谱压缩,实现了无误码传输100km及传输后的解复用。实验结果表明,AWG的使用使得OTDM信号的频谱效率提高至4倍。
The concept of demultiplexing window matched filter is proposed and the spectral compression technique to improve the optical time-division multiplexing (OTDM) spectral efficiency by using optical band-pass filter is analyzed. Based on self-made 40Gb / s OTDM multiplexer, feedback loop demultiplexing module consisting of EAM and clock extraction module and matched filter of array waveguide grating (AWG) as electrical absorption sampling window (EASW) On 4 × 10Gbit / sOTDM signal spectral compression, to achieve a 100km error-free transmission and after the demultiplexing. The experimental results show that the use of AWG makes the spectral efficiency of OTDM signal increased to 4 times.