Precise Optical Modulation Using Extinction-Ratio and Chirp Tunable Single-Drive Mach–Zehnder Modulator
Precise Optical Modulation Using Extinction-Ratio and Chirp Tunable Single-Drive Mach–Zehnder Modulator
复制标题
使用消光比和线性调频可调单驱动马赫-曾德调制器进行精确光调制
DOI：
10.1109/jlt.2017.2758421
复制
发表时间：
2017
影响因子：
4.7
通讯作者：
H. Nakajima
中科院分区：
文献类型：
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作者：
Yuya Yamaguchi;A. Kanno;T. Kawanishi;M. Izutsu;H. Nakajima
分析了具有光功率和相位不平衡的Mach-Zehnder （MZ）调制器的复杂传递函数和调制谱。通过计算，我们发现在高消光比、零啁啾和IQ平面直线轨迹三种情况下都可以获得特征运算。然而，结果也表明，由于单驱动调制器中的寄生啁啾较小，我们无法实现与理想调制器等效的操作。为了分别控制消光比和啁啾参数，我们提出了一种带有可调谐y支路的集成调制器。利用光功率不平衡可调谐调制器，实验验证了其特性运算，得到了与理想MZ调制器等效的调制频谱。然而，与理想调制器相比，MZ调制器在正弦响应中表现出固有的非线性。因此，我们采用了一种利用电三阶谐波叠加的三阶非线性补偿方法。实测频谱仅由一阶调制边带组成，相当于理想的双边带抑制载波调制。
We analyzed the complex transfer function and modulation spectrum of the Mach–Zehnder (MZ) modulator with optical power and phase change imbalances. From the calculations, we found that the characteristic operation can be obtained in three cases: high extinction ratio, zero-chirp, and straight-line trajectory in the IQ plane. However, the results also indicate that we cannot achieve an operation equivalent to that of the ideal modulator, due to the small parasitic chirp in a single-drive modulator. To control the extinction ratio and chirp parameter individually, we propose an integrated modulator with some tunable Y-branches. By using the optical-power-imbalance tunable modulators, we experimentally demonstrate the characteristic operations and obtain the modulation spectrum equivalent to the ideal MZ modulator. However, compared to the ideal amplitude modulator, MZ modulators exhibit an intrinsic nonlinearity in the sinusoidal response. Therefore, we used a third-order nonlinearity compensation method using the superposition of electrical third-order harmonics. The measured spectrum consisted of only first-order modulation sidebands, which is equivalent to the ideal double-sideband suppressed-carrier modulation.
光纤跟踪基础知识
DOI：
--
发表时间：
2006
期刊：
diffusion perfusion MRI Medical View Co., Ltd
影响因子：
--
作者：
Yamada;Kei
通讯作者：
Kei