Author : C.P. Vardhani and S. Neelima

This paper aims to investigate the device based on symmetric Y-branch comprising of S-bend waveguide. Initially, a symmetric Y-junction based 1×2 optical power splitter is designed, which can deliver the best result in simulated performance. The design is, however, not technology-compatible to be fabricated in LiTaO3, and therefore, the design is modified by incorporating a finite gap at the splitting junction, instead of zero-gap. Inclusion of this gap in the design slightly deteriorates the simulated performance of the splitter, however, a relatively better post fabrication performance is expected in terms of total insertion loss, non-uniformity and the polarization dependent loss. Beam propagation method is applied for this work, where S-bend waveguides are designed for optimal field matching in each Y-branch section of the optical splitter.

Keywords: Beam propagation method ; Insertion loss ;Non-uniformity; Optical splitter ;Polarization, dependent loss; Y-junction.

Article published in International Journal of Current  Engineering  and Technology, Vol.3,No.4(Oct- 2013)