Reduction of phase-difference deviation in 90° optical hybrid over wide wavelength range
Reduction of phase-difference deviation in 90° optical hybrid over wide wavelength range
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在宽波长范围内减少 90° 光混合中的相位差偏差
DOI：
10.1587/elex.7.216
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Hiroshi Takahashi
中科院分区：
文献类型：
--
作者：
Y. Sakamaki;Y. Nasu;T. Hashimoto;K. Hattori;T. Saida;Hiroshi Takahashi
我们描述了一种降低了依赖波长的相位差异的技术，在90°光学混合体中，由四个3-dB耦合器和一个相位变速器组成，我们用我们提出的技术来制造90°混合。基于二氧化硅的平面灯波技术。对于以100 GBIT/s或更高操作的传输系统的数字相干接收器有用。
We describe a technique for reducing the wavelengthdependent phase-difference deviation between in-phase and quadrature components in an 90◦ optical hybrid consisting of four 3-dB couplers and a phase shifter. We fabricated the 90◦ hybrid with our proposed technique, which uses silica-based planar lightwave circuit technology. The fabricated 90◦ hybrid exhibits a low phase-difference deviation from 90◦ of less than 0.7◦ over the Cand L-bands, and will be useful in a digital coherent receiver for transmission systems operating at 100 Gbit/s or more.