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A 56-Gb/s PAM4 InP HBT Driver IC Compensating for Nonlinearity of Extinction Curve of EAM

机译:补偿EAM消光曲线非线性的56 Gb / s PAM4 InP HBT驱动器IC

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We devised a PAM4 driver IC that can compensate for the nonlinearity of the extinction curve of an electroabsorption modulator (EAM). The driver was designed and fabricated by using our InP HBT technology (f = 290 GHz, f = 320 GHz). The driver can adjust the modulation voltage swing for each intensity level to obtain clear eye openings in the optical domain. The results showed clear eye openings of the optical output waveform when compensating for the nonlinearity. To evaluate the effect of compensating for the nonlinearity quantitatively, the bit error rate (BER) was measured. A minimum receiver sensitivity of -9 dBm was observed when compensating at a BER of 2 × 10-4, while a minimum receiver sensitivity was not observed at the BER without compensating. Our PAM4 driver can provide clear 56-Gb/s optical eye openings compensating for the nonlinearity of the extinction curve of an EAM.
机译:我们设计了一种PAM4驱动器IC,它可以补偿电吸收调制器(EAM)消光曲线的非线性。该驱动器是使用我们的InP HBT技术(f = 290 GHz,f = 320 GHz)设计和制造的。驱动器可以针对每个强度水平调整调制电压摆幅,以在光域中获得清晰的眼睛睁开。结果表明,在补偿非线性时,光输出波形的眼图张开明显。为了定量评估非线性补偿的效果,测量了误码率(BER)。当以2×10-4的BER进行补偿时,观测到的最小接收器灵敏度为-9 dBm,而如果不进行补偿,则在BER下未观测到最小的接收器灵敏度。我们的PAM4驱动器可以提供清晰的56 Gb / s光学眼图开度,以补偿EAM消光曲线的非线性。

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