Design, Fabrication, and Characterization of Dual ARROW Power Splitters

• Main Authors: Keng-Hua Kuo, 郭耿華
• Other Authors: Yang-Tung Huang
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/63807660738701172580

碩士 === 國立交通大學 === 電子工程系所 === 95 === In this thesis, dual ARROW power splitters are investigated, including device design, fabrication, and characterization. With thicker guiding region, ARROW could be coupled with single-mode fiber more efficiently. Furthermore, dual ARROW waveguides possess the significant feature that the relation between the coupling length and the separation width is periodic. Better performance is realized by designing dual ARROW power splitters with ARROW structure in the vertical direction. We begin with analyzing and designing ARROW structure with the transfer matrix method (TMM) and the effective index method (EIM). Then, the beam propagation method (BPM) is utilized to simulate dual ARROW power splitters. With above analytical methods and simulation results, we designed dual ARROW power splitters with two different separation widths which are 3.2 μm and 13.8μm. In addition, we fabricated these devices and measured the characteristics. The measurement results as follows: The average value of the imbalance and the standard deviation of the power splitter whose separation width is 3.2 μm are 1.201 dB and 0.321 dB for TE mode, 1.369 dB and 0.244 dB for TM mode. The average value of the imbalance and the standard deviation of the power splitter with the separation width of 13.8 μm are 1.262 dB and 0.273 dB for TE mode, 1.627 dB and 0.229 dB for TM mode. The propagation losses of the ridge waveguide for TE and TM modes are 0.928~1.264 dB/cm and 3.899~4.131 dB/cm. Experimental results are discussed and some suggestions are given. Measured results show that our dual ARROW power splitters have the ability to provide the characteristic of power balance.