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Comparison between different roughness shapes based on channel waveguide

M. SYUHAIMI AB-RAHMAN1, F. ATER1,* , M. HASSAN2, R. MOHAMMAD3, I-SHYAN HWANG4

Affiliation

  1. aSpectrum Technology Research Division (SPECTEC), Faculty of Engineering& Built Environment, Department of Electrical, Electronic and Systems Engineering, University Kebangsaan Malaysia (UKM), No. 436
  2. Asia Pacific University of Technology & Innovation, School of Engineering, Bukit Jalil, 57000 Kuala Lumpur Malaysia
  3. Faculty of Applied Sciences, Universiti Teknologi Mara (UiTM) 40450, Shah Alam, Selangor, Malaysia
  4. Computer Communications (Networks), Distributed Computing, Information Science, Yuan Ze University, Taoyuan City 32003, Taiwan

Abstract

The present paper compares the effect of different roughness shapes on optical channel waveguides in terms of output power, insertion loss and attenuation coefficient. The analysis based simulation was performed using OptiBPM software which is adapted to simulate the performance of these waveguide structures. Varying-depths of roughness, rd ranging from 0 to 0.5μm and waveguide width variations from w = 2μm, 4μm, and w = 6μm are considered and numerical results are obtained for channel waveguide propagation losses due to roughness induced scattering. The results indicate that scattering loss increases as SWR depth increases, which leads to reduce the output power significantly especially for narrow waveguide (w < 4μm) and high roughness depth (rd > 0.2μm). Accordingly, attenuation coefficient and insertion loss increases due to the corresponding reduction in output power. The propagation loss of the waveguide increases dramatically upon increasing the SWR of the channel. It can be concluded, that the sensitivity of propagation loss is more severely affected by the small waveguide width i.e. w < 4μm and less by the large ones i.e. w > 4μm. Finally it has been shown according to our typical values, it seems that sinusoidal-like SWR and triangular is more affected compared to random one due to the periodicity nature of shape which affects the overall phase interference. Further study should attempt to reduce the roughness of waveguide to lower the scattering loss..

Keywords

Channel waveguide, Insertion losses, Output power, Roughness shapes, Scattering loss, Sidewall roughness.

Submitted at: Aug. 18, 2015
Accepted at: Sept. 9, 2015

Citation

M. SYUHAIMI AB-RAHMAN, F. ATER, M. HASSAN, R. MOHAMMAD, I-SHYAN HWANG, Comparison between different roughness shapes based on channel waveguide, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 9-10, pp. 1577-1581 (2015)