We propose three different types of all-optical code converters with high data rates of 1 Tbps based on a semiconductor optical amplifier in Mach–Zehnder interferometer configuration. The gray code is a cyclic code, which is more suitable for accurate representation of numbers, error detection, correction, and rounding of decimal quantities. The OR and XOR logic gates are the key structures in the proposed design to convert binary inputs to gray (BITG), binary coded decimal (BCD) inputs to gray (BCDTG) and octal inputs to binary (OCTB) outputs. The output of proposed all-optical gray code converters is verified for all three types of input representations. The bit error rate is negligible for all the input combinations. The obtained average extinction ratio for all-optical code converters are 87, 84, and 78 dB. The optimum value of quality factor up to 59 is achieved at 0.1 A, ±5, and 0.3, respectively, for the injection current, linewidth enhancement factor, and optical confinement factor. For the first time to the authors’ knowledge, all-optical gray code converters yield high data rates of 1 Tbps for the semiconductor optical amplifier-Mach–Zehnder interferometer configurations using the M-ary differential phase-shift keying modulation scheme.

中文翻译：

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具有Mary DPSK编码的二进制，灰度和八进制输入的基于SOA-MZI的Tbps全光灰度转换器的设计和性能分析

我们基于Mach–Zehnder干涉仪配置中的半导体光放大器，提出了三种不同类型的具有1 Tbps高数据速率的全光代码转换器。格雷码是循环码，它更适合于数字的精确表示，错误检测，校正和十进制数的舍入。OR和XOR逻辑门是提出的设计中的关键结构，可以将二进制输入转换为灰度（BITG），将二进制编码的十进制（BCD）输入转换为灰度（BCDTG），将八进制输入转换为二进制（OCTB）输出。对于所有三种类型的输入表示，都对提出的全光学格雷码转换器的输出进行了验证。对于所有输入组合，误码率均可以忽略不计。获得的全光代码转换器的平均消光比为87、84和78 dB。对于注入电流，线宽增强因子和光学限制因子，分别达到0.1 A，±5和0.3时，品质因数的最佳值达到59。对于作者来说，这是第一次，对于使用Mary差分相移键控调制方案的半导体光放大器-Mach-Zehnder干涉仪配置，全光格雷码转换器可产生1 Tbps的高数据速率。