Ultra-compact low-loss 1 × 4 optical power splitter with splitting ratio of 1∶2∶4∶8 based on two-stage cascaded MMI couplers.

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ID: 86737
2019
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Abstract
An ultra-compact low-loss 1×4 optical power splitter with a splitting ratio of 1∶2∶4∶8 is proposed and demonstrated on a 220-nm-thick silicon-on-insulator (SOI) platform at the C band. The splitter is based on two stages of a cascaded 1×3 multimode interference (MMI) coupler and a 4×4 MMI coupler. The footprint of the device is 124.0  μm×6.4  μm, which is more compact than the traditional scheme of four-stage cascaded 1×2 MMI couplers. Phase shifters based on taper waveguides are incorporated in the device as the connection of two MMI couplers. The fabricated device exhibits a 3 dB power difference with a deviation of less than 0.88 dB from 1530 nm to 1570 nm. The average power difference is 3.14 dB at the center of the C band with an insertion loss of 1.84 dB.
Reference Key
li2019ultracompactoptics Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zezheng Li, Yang Liu, Huan Guan, Weihua Han, Zhiyong Li
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Journal optics letters
Year 2019
DOI
10.1364/OL.44.005622
URL
Keywords
plasmonic sensors nanohole arrays plasmon rulers point-of-care diagnosis protein biomarkers

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