Enhancing the performance of strip and 180-deg slot waveguide bends for integrated optical waveguide modulator

Musab A.M. Al-Tarawni; A. Ashrif A. Bakar; Ahmad Rifqi Zain; Mou’ad A. Tarawneh; Sahrim Hj. Ahmad

doi:10.1117/1.OE.58.2.027104

8 February 2019 Enhancing the performance of strip and 180-deg slot waveguide bends for integrated optical waveguide modulator

Musab A.M. Al-Tarawni, A. Ashrif A. Bakar, Ahmad Rifqi Zain, Mou’ad A. Tarawneh, Sahrim Hj. Ahmad

Author Affiliations +

Optical Engineering, Vol. 58, Issue 2, 027104 (February 2019). https://doi.org/10.1117/1.OE.58.2.027104

Abstract

Waveguide bends are essential structures for designing an integrated optical waveguide modulator (IOWM). However, reducing bending loss for strip and slot waveguide bends and obtaining a small increment of footprint size by bending the radius are challenging issues. We aim to evaluate whether using strip waveguides with an adiabatic bend reduces the bending loss and to obtain a specific length suitable for a V-shaped mode converter with a small increment of footprint size in the IOWM. Furthermore, a new 180-deg-bend structure for slot waveguides, to reduce bending loss, is investigated. The results of reducing bending radius (R) with a large coverage angle (α_c) for strip waveguide bends revealed a low bending loss and simultaneously a reduction of the footprint size in the IOWM. For the 180-deg slot waveguide bend, both the bending and coupling losses were reduced by optimizing the taper and distance offset, which enhanced transmission power efficiency. We validated the feasibility and efficiency of the proposed bending strip and slot structures in IOWM, which is important for integrated optical applications.

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Musab A.M. Al-Tarawni, A. Ashrif A. Bakar, Ahmad Rifqi Zain, Mou’ad A. Tarawneh, and Sahrim Hj. Ahmad "Enhancing the performance of strip and 180-deg slot waveguide bends for integrated optical waveguide modulator," Optical Engineering 58(2), 027104 (8 February 2019). https://doi.org/10.1117/1.OE.58.2.027104

Received: 11 August 2018; Accepted: 18 January 2019; Published: 8 February 2019

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