Frequency Chirp Modulation by Electro-Optic Modulator Integrated with Microwave Rat-Race Circuit and Measurement of Chirp Parameter by Using Optical Fiber Dispersion
Frequency Chirp Modulation by Electro-Optic Modulator Integrated with Microwave Rat-Race Circuit and Measurement of Chirp Parameter by Using Optical Fiber Dispersion
复制标题
集成微波环形电路的电光调制器调频及光纤色散测量线性调频参数
DOI：
10.1109/mwsym.2016.7539999
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
and T. Kawanishi
中科院分区：
文献类型：
--
作者：
R. Nakamura;K. Yamamoto;T. Kawai;A. Enokihara;and T. Kawanishi
将具有非对称功率分配比的180度混合电路与双电极型电光调制器集成在同一衬底上。由此，实现了具有紧凑配置的频率啁啾调制。在Z切LiNbO3衬底上设计了4.5：1功率分配比的RR电路。通过观察输出光谱证实了调制器的工作。此外，啁啾参数直接测量通过使用光纤的色散，其中检测到的调制信号通过光纤传输的功率损失作为光纤距离的函数进行观察。通过测量确认了调制光在10GHz处的啁啾参数为0.47。
The rat-race (RR) circuit, which operates as a 180-degree hybrid, with an asymmetric power split ratio was integrated with the dual electrode type electro-optic modulator on the same substrate. Thereby, frequency chirp modulation with a compact configuration was realized. The RR circuit was designed with 4.5:1 power split ratio on a z-cut LiNbO3substrate. The operation of the modulator was confirmed by observing the output light spectra. Moreover, the chirp parameter was directly measured by using the chromic dispersion of the optical fiber, where the power penalty of detected modulation signals transmitted through optical fiber was observed as a function of the fiber distance. The chirp parameter of the modulated light at 10 GHz was confirmed to be 0.47 by the measurement.