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Proceedings Paper

Bi-directional triplexer with butterfly MMI coupler using SU-8 polymer waveguides
Author(s): David Mareš; Vítĕzslav Jeřábek; Václav Prajzler
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Paper Abstract

We report about a design of a bi-directional planar optical multiplex/demultiplex filter (triplexer) for the optical part of planar hybrid WDM bi-directional transceiver in fiber-to-the-home (FTTH) PON applications. The triplex lightwave circuit is based on the Epoxy Novolak Resin SU-8 waveguides on the silica-on-silicon substrate with Polymethylmethacrylate cladding layer. The triplexer is comprised of a linear butterfly concept of multimode interference (MMI) coupler separating downstream optical signals of 1490 nm and 1550 nm. For the upstream channel of 1310 nm, an additional directional coupler (DC) is used to add optical signal of 1310 nm propagating in opposite direction. The optical triplexer was designed and optimized using beam propagation method. The insertion losses, crosstalk attenuation, and extinction ratio for all three inputs/outputs were investigated. The intended triplexer was designed using the parameters of the separated DC and MMI filter to approximate the idealized direct connection of both devices.

Paper Details

Date Published: 6 January 2015
PDF: 9 pages
Proc. SPIE 9450, Photonics, Devices, and Systems VI, 94500V (6 January 2015); doi: 10.1117/12.2073239
Show Author Affiliations
David Mareš, Czech Technical Univ. in Prague (Czech Republic)
Vítĕzslav Jeřábek, Czech Technical Univ. in Prague (Czech Republic)
Václav Prajzler, Czech Technical Univ. in Prague (Czech Republic)

Published in SPIE Proceedings Vol. 9450:
Photonics, Devices, and Systems VI
Pavel Tománek; Dagmar Senderáková; Petr Páta, Editor(s)

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