Unconstrained splitting ratios in compact double-MMI couplers

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)

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 languageEnglish
Pages (from-to)9245-9253
JournalOptics Express
Volume22
Issue number8
DOIs
Publication statusPublished - 21 Apr 2014
MoE publication typeA1 Journal article-refereed

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couplers
SOI (semiconductors)
wafers
waveguides
interference
simulation

Cite this

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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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language = "English",
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Unconstrained splitting ratios in compact double-MMI couplers. / Cherchi, Matteo; Ylinen, Sami; Harjanne, Mikko; Kapulainen, Markku; Vehmas, Tapani; Aalto, Timo.

In: Optics Express, Vol. 22, No. 8, 21.04.2014, p. 9245-9253.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

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

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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

M3 - Article

C2 - 24787812

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JO - Optics Express

JF - Optics Express

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