Unconstrained splitting ratios in compact double-MMI couplers

Matteo Cherchi; Sami Ylinen; Mikko Harjanne; Markku Kapulainen; Tapani Vehmas; Timo Aalto

doi:10.1364/OE.22.009245

Unconstrained splitting ratios in compact double-MMI couplers

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Abstract

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.

Original language	English
Pages (from-to)	9245-9253
Journal	Optics Express
Volume	22
Issue number	8
DOIs	https://doi.org/10.1364/OE.22.009245
Publication status	Published - 21 Apr 2014
MoE publication type	A1 Journal article-refereed

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10.1364/OE.22.009245

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title = "Unconstrained splitting ratios in compact double-MMI couplers",

abstract = "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.",

author = "Matteo Cherchi and Sami Ylinen and Mikko Harjanne and Markku Kapulainen and Tapani Vehmas and Timo Aalto",

year = "2014",

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T1 - Unconstrained splitting ratios in compact double-MMI couplers

AU - Cherchi, Matteo

AU - Ylinen, Sami

AU - Harjanne, Mikko

AU - Kapulainen, Markku

AU - Vehmas, Tapani

AU - Aalto, Timo

PY - 2014/4/21

Y1 - 2014/4/21

N2 - 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.

AB - 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.

U2 - 10.1364/OE.22.009245

DO - 10.1364/OE.22.009245

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VL - 22

SP - 9245

EP - 9253

JO - Optics Express

JF - Optics Express

IS - 8

ER -

Unconstrained splitting ratios in compact double-MMI couplers

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