Based on time division multiplexing (TDM) technology, a high baud rate optical transceiver is proposed in this paper, which is compatible with pulse amplitude modulation.Narrow sampling pulses of only 30 ps bottom width, or 11.9 ps full width at half maximum are repeatedly generated by Mach-Zehnder interferometer (MZI) switch with its specific double rail driver.The 4-stage cascaded high speed switches with synchronous drivers at 20 GHz are employed to create four 11.5 ps recurrent time slots for parallel modulation and detection, and one 4 ps time slot for clock recovery.Then a transmission channel at 80 GBaud with 4 bit streams at 20 Gbps is realized in simulator.The extinction ratio corresponding to the TDM mechanism can reach 2.32 dB with 10dB depth modulator.And the commercial optical power budget can cover the 7.84 dB insertion loss produced by the TDM structure.%基于时分多路复用技术实现了1种兼容脉冲幅度调制的高波特率光收发器.通过光电协同设计,在订制电路的双端驱动下,马赫-曾德尔干涉仪型高速光开关产生出半高宽仅11.9 ps的采样脉冲.在20 GHz时钟的同步驱动下,4路级联光开关为4路并行通道切分出4个宽11.5 ps的时隙以实现并行调制或探测,并有1个宽4ps的时隙用于时钟恢复,从而在仿真器上将4路20 Gbps位流复用到单路80 GBoud光链路上.采用调制深度为10 dB的调制器,该光收发器的输出消光比可达到2.32 dB,而其所造成的7.84 dB插入损耗也满足商用光收发器的光功率预算要求.
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