Ye Mengyuan, Yu Yu, Chen Guanyu, Luo Yuchan, Zhang Xinliang
Opt Express. 2015 Dec 14;23(25):32130-8. doi: 10.1364/OE.23.032130.
We propose and fabricate a wavelength-division-multiplexing (WDM) compatible and multi-functional mode-division-multiplexing (MDM) integrated circuit, which can perform the mode conversion and multiplexing for the incoming multipath WDM signals, avoiding the wavelength conflict. An phase-to-intensity demodulation function can be optionally applied within the circuit while performing the mode multiplexing. For demonstration, 4 × 10 Gb/s non-return-to-zero differential phase shift keying (NRZ-DPSK) signals are successfully processed, with open and clear eye diagrams. Measured bit error ratio (BER) results show less than 1 dB receive sensitivity variation for three modes and four wavelengths with demodulation. In the case without demodulation, the average power penalties at 4 wavelengths are -1.5, -3 and -3.5 dB for TE₀-TE₀, TE₀-TE₁ and TE₀-TE₂ mode conversions, respectively. The proposed flexible scheme can be used at the interface of long-haul and on-chip communication systems.
我们提出并制造了一种与波分复用（WDM）兼容的多功能模式分割复用（MDM）集成电路，该电路可以对输入的多径WDM信号进行模式转换和复用，避免波长冲突。在执行模式复用时，可在电路内选择性地应用相位到强度解调功能。为了进行演示，成功处理了4×10 Gb/s的非归零差分相移键控（NRZ-DPSK）信号，眼图清晰开阔。测量的误码率（BER）结果表明，在解调情况下，三种模式和四个波长的接收灵敏度变化小于1 dB。在不解调的情况下，对于TE₀-TE₀、TE₀-TE₁和TE₀-TE₂模式转换，4个波长处的平均功率代价分别为-1.5、-3和-3.5 dB。所提出的灵活方案可用于长途和片上通信系统的接口。
