A Novel Planar Waveguide Super-Multiple-Channel Optical Power Splitter


In this paper, we have a tendency to have proposed a completely unique planar waveguide optical-power-splitter design with a large range of splitting channels. The look uses the wavefront lateral interference in light propagation in a very slab waveguide, with its core properly adjusted in different areas for achieving different effective indices for the required section delays. Therefore, the full structure is reminiscent of a nonblocking all-pass filter, hence, suffers a very small insertion loss. Another unique advantage of this structure lies in its weak length dependence on the amount of splitting channels; though its lateral size should be scaled up as the channel variety increases, as opposed to standard splitters with each of its length and lateral size scaled up with increasing channel numbers. Our numerical simulation results show that, for a one-to-256 channel splitter at intervals a operating wavelength band from 1530 to 1570 nm, the insertion loss is below 1.3 dB. The channel nonuniformity is less than 5 dB within the same band. The specified size is at intervals a pair of.5 mm by 10 mm on the silicon-on-insulator platform. The proposed structure can readily be extended to different material platforms, like the silica-primarily based planar lightwave circuit or semiconductors. Its fabrication method is totally compatible with customary clean-space technologies, such as photolithography and etching, without any difficult and/or pricey approach concerned.

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