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首页> 外文期刊>IEEE Journal of Solid-State Circuits >A 4 Gb/s 2-level to 2 Gsymbol/s 4-level converter GaAs IC for semiconductor optical amplifier QPSK modulators
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A 4 Gb/s 2-level to 2 Gsymbol/s 4-level converter GaAs IC for semiconductor optical amplifier QPSK modulators

机译：用于半导体光放大器QPSK调制器的4 Gb / s 2级至2 Gsymbol / s 4级转换器GaAs IC

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摘要

The design of a 50 /spl Omega/ impedance matched two-to-four level converter GaAs IC for two-electrode semiconductor optical amplifier (SOA) modulators is presented. The designed IC exhibits eye diagrams with eye openings of better than 0.30 V and a spacing between adjacent output signal levels of 0.33 V for output symbol rates of up to 2 Gsymbol/s corresponding to input bit rates of up to 4 Gb/s. A novel differential super buffer output driver is applied, for which output reflection coefficients |S/sub 22/| of less than -12 dB for frequencies up to 10 GHz are obtained. A 1 Gb/s optical QPSK microwave link transmission experiment using a packaged sample of the designed IC and a two-electrode semiconductor optical amplifier phase modulator has been conducted.
机译：提出了一种用于两电极半导体光放大器（SOA）调制器的50 / spl Omega /阻抗匹配的二到四电平转换器GaAs IC的设计。设计的IC展示眼图，其眼图张开度大于0.30 V，相邻输出信号电平之间的间距为0.33 V，对于高达2 Gsymbol / s的输出符号率，对应于高达4 Gb / s的输入比特率。应用了新颖的差分超级缓冲器输出驱动器，其输出反射系数| S / sub 22 / |。对于高达10 GHz的频率，可获得小于-12 dB的噪声。进行了1 Gb / s光学QPSK微波链路传输实验，使用了设计好的IC的封装样品和两电极半导体光放大器相位调制器。

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