Chung Hung-Ching, Lu Guan-Xun, Tseng Shuo-Yen
Opt Express. 2022 Feb 28;30(5):8115-8125. doi: 10.1364/OE.450230.
We introduce adiabaticity engineering in coupled waveguide devices to achieve shortcuts to adiabaticity in multi-wavelength systems. By engineering the adiabaticity distribution using a single control parameter, we obtain large operating bandwidth in a compact device. Multi-wavelength adiabaticity engineering is applied to the design of silicon polarization splitter-rotators. The total length of the designed polarization splitter-rotator is 141 μm, and simulations show that the device exhibits extinction ratios above 28 dB and 16 dB for the TE and TM modes, respectively, with a bandwidth of 300 nm (from 1.4 μm to 1.7 μm). The fabrication tolerance of the designed device is also simulated.
我们在耦合波导器件中引入绝热工程，以在多波长系统中实现绝热捷径。通过使用单个控制参数来设计绝热分布，我们在紧凑的器件中获得了较大的工作带宽。多波长绝热工程被应用于硅偏振分束-旋转器的设计。所设计的偏振分束-旋转器的总长度为141μm，模拟结果表明，该器件在300nm（从1.4μm到1.7μm）的带宽内，TE和TM模式的消光比分别高于28dB和16dB。我们还模拟了所设计器件的制造容差。
