Wang Zhutian, Xu Chenxi, Shi Zhiming, Ye Nan, Guo Hairun, Pang Fufei, Song Yingxiong
The Key Laboratory of Specialty Fiber Optics and Optical Access Networks, School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China.
Micromachines (Basel). 2024 Apr 15;15(4):530. doi: 10.3390/mi15040530.
A 2 μm wavelength band spot size converter (SSC) based on a trident structure is proposed, which is coupled to a lensed fiber with a mode field diameter of 5 μm. The cross-section of the first segment of the tapered waveguide structure in the trident structure is designed as a right-angled trapezoidal shape, which can further improve the performance of the SSC. The coupling loss of the SSC is less than 0.9 dB in the wavelength range of 1.95~2.05 μm simulated by FDTD. According to the experimental results, the lowest coupling loss of the SSC is 1.425 dB/facet at 2 μm, which is close to the simulation result. The device is compatible with the CMOS process and can provide a good reference for the development of 2 μm wavelength band integrated photonics.
提出了一种基于三叉戟结构的2μm波段光斑尺寸转换器（SSC），它与模场直径为5μm的透镜光纤耦合。三叉戟结构中锥形波导结构第一段的横截面设计为直角梯形，这可以进一步提高光斑尺寸转换器的性能。通过FDTD模拟，在1.95~2.05μm波长范围内，光斑尺寸转换器的耦合损耗小于0.9dB。根据实验结果，光斑尺寸转换器在2μm处的最低耦合损耗为1.425dB/面，与模拟结果接近。该器件与CMOS工艺兼容，可为2μm波段集成光子学的发展提供良好的参考。
