提出了一种改进的级联全光量化方案,以提高全光模数转换器的量化分辨率。通过使用一路附加的被强度调制器调制的标记通道,可实现对超宽带信号的8 bit以上高量化分辨率。利用所提出的方案对20 GHz射频信号实现了数字化,仿真结果表明,其无杂散动态范围可高达53.76 dBc,有效量化分辨率为8.18 bit。

We propose an improved cascade all-optical quantizing scheme for the resolution enhancement of all-optical analog-to-digital converter. Employing an additional intensity-modulated label channel, remarkable quantization resolution over 8 bit is feasible for an ultra-wideband signal. Simulation results show that a 20 GHz radio frequency signal is digitalized using the proposed scheme with the spur-free dynamic range of 53.76 dBc and effective-number-of-bits of 8.18 bit.