Journal
OPTICS EXPRESS
Volume 22, Issue 8, Pages 9245-9253Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.009245
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Funding
- European Community [ICT-FET 270773]
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A novel guided-wave optical power coupler is presented, based on two 2x2 50/50 multimode interference splitters connected with tapered waveguides that play the role of a phase shifter. By simply changing the length of this phase shifter, these double-MMI couplers can be easily designed to get any desired splitting ratio. Results of simulations are discussed and compared with the characterizations of devices fabricated on micron-scale SOI wafers, to highlight pros and cons of the proposed solution. The fabricated splitters have been found to have average losses about 0.4 +/- 0.5 dB and splitting ratios ranging from 56/44 to 96/4. (C) 2014 Optical Society of America
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