光学
阵列波导光栅
极化(电化学)
多路复用器
栅栏
材料科学
波长
氮化硅
光电子学
波导管
纳米光子学
波分复用
多路复用
物理
硅
电信
化学
物理化学
计算机科学
作者
Qi Han,Jonathan St-Yves,Yuxuan Chen,Michel Ménard,Wei Shi
出处
期刊:Optics Letters
[The Optical Society]
日期:2019-08-07
卷期号:44 (16): 3976-3976
被引量:24
摘要
Next-generation passive optical networks require integrated, polarization-insensitive wavelength-division multiplexing solutions, for which the recently emerging low-loss silicon nitride nanophotonic platforms hold great potential. A novel polarization-insensitive arrayed waveguide grating (AWG) built with silicon nitride waveguides is presented in this Letter. Polarization insensitivity is obtained when both the channel spacing and the center wavelength of the two orthogonal polarization states (i.e., the TE and TM waveguide modes) are simultaneously aligned. In our design, the channel spacing alignment between the polarization states is obtained by optimizing the geometry of the arrayed waveguides, whereas the central wavelength polarization insensitivity is obtained by splitting the two polarization states and adjusting their angle of incidence at the input star coupler to compensate for the polarization mode dispersion of the AWG. A 100 GHz 1×8 wavelength-division multiplexer with crosstalk levels below −16 dB is demonstrated experimentally.
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