Optical Isolator for TE Polarized Light Realized by Adhesive Bonding of Ce:YIG on Silicon-on-Insulator Waveguide Circuits
Optical Isolator for TE Polarized Light Realized by Adhesive Bonding of Ce:YIG on Silicon-on-Insulator Waveguide Circuits
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DOI：
10.1109/jphot.2013.2264275
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发表时间：
2013-06-01
影响因子：
2.4
通讯作者：
Baets, R.
中科院分区：
文献类型：
--
作者：
Ghosh, S.;Keyvaninia, S.;Baets, R.
通过将亚铁磁石榴石芯片粘合在 380 nm 厚的硅波导电路顶部，演示了用于横向电 (TE) 偏振光的光学隔离器。偏振旋转器在非互易马赫-曾德尔干涉仪的臂中实现，以将非互易移相器区域中的偏振旋转为横磁。介绍了干涉仪臂中 TM 模式所经历的作为键合层厚度函数的不可逆相移 (NRPS) 的计算，以及偏振旋转器鲁棒性的模拟。实验上，使用横向于光传播方向的磁场在 1540.5 nm 波长处测得 32 dB 隔离度。这为激光二极管和光隔离器在硅光子平台上的协同集成铺平了道路。
An optical isolator for transverse electric (TE) polarized light is demonstrated by adhesive bonding of a ferrimagnetic garnet die on top of a 380 nm thick silicon waveguide circuit. Polarization rotators are implemented in the arms of a nonreciprocal Mach-Zehnder interferometer to rotate the polarization to transverse magnetic in the nonreciprocal phase shifter regions. Calculation of the nonreciprocal phase shift (NRPS) as a function of bonding layer thickness experienced by the TM mode in the interferometer arms is presented, together with the simulation of the robustness of the polarization rotator. Experimentally, 32 dB isolation is measured at 1540.5 nm wavelength using a magnetic field transverse to the light propagation directions. This paves the way to the cointegration of laser diodes and optical isolators on a silicon photonics platform.