Mohammad  Syuhaimi Ab-Rahman, I.  Shyan Hwang, Ainon  Najahah Abd Aziz, Foze  Ater Saleh, 
    Sidewall Roughness in Y-Shaped Waveguide: The Effect to the Signal Quality,
    Journal of Engineering and Applied Sciences,
    Volume 14,Issue 21,
    2019,
    Pages 7841-7845,
    ISSN 1816-949x,
    jeasci.2019.7841.7845,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2019.7841.7845)
    Abstract: In this study the level of sidewall roughness was monitored with depth and structure of roughness
to see its effect to signal quality of optical network. Sidewall roughness is contributes to scattering loss in
waveguide and leads to signal distortion. Y-shaped waveguide to develop 1×2 optical splitter was designed
with 6 different roughness depth and roughness was placed at 3 different structures. 1×2 optical splitter
waveguide integrated into optical network and the signal quality analyzed by its Q-factor. Simulation results
show that Q-factor values was decreasing as roughness get deeper on 0.6 μm and sidewall roughness
on s-bend structure also, contributes to higher signal distortion compares to roughness on linear structure.
Therefore, it is necessary for us to monitor the level of sidewall roughness to ensure the quality of optical
signal.
    Keywords: optical signal;linear structure;signal quality;optical splitter;Sidewall roughness;Q-factor