Linear Tapered Wavelength Division Multiplexing (WDM) Phasor Array to Improve Coupling Efficiency

The rapid growth in demand for high-capacity telecommunication links, and the speed limitation of single-wavelength links, has resulted in an extraordinary increase in the use of wavelength-division multiplexing (WDM) in advanced lightwave networks. The existing research focuses on waveguide tapering, with limited attention given to tapering effects in WDM phasor arrays. This study introduces a tapered WDM phasor array and investigates how the tapering ratio influences the output field. A WDM phasor array with linear tapering is designed with uniform separation. The performance is analyzed across various tapering ratios and compared with the non-tapered structure. The ouput is analyzed in terms of optical field, electric field and effective refractive index. Results show that lower tapering ratios improve output compared to non-tapered designs, while higher tapering ratios lead to reduced output field strengths.