Bi-directional triplexer with butterfly MMI coupler using SU-8 polymer waveguides

David Mareš; Vítĕzslav Jeřábek; Václav Prajzler

doi:10.1117/12.2073239

6 January 2015 Bi-directional triplexer with butterfly MMI coupler using SU-8 polymer waveguides

David Mareš, Vítĕzslav Jeřábek, Václav Prajzler

Proceedings Volume 9450, Photonics, Devices, and Systems VI; 94500V (2015) https://doi.org/10.1117/12.2073239
Event: Photonics Prague 2014, 2014, Prague, Czech Republic

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.

Citation Download Citation

David Mareš, Vítĕzslav Jeřábek, and Václav Prajzler "Bi-directional triplexer with butterfly MMI coupler using SU-8 polymer waveguides", Proc. SPIE 9450, Photonics, Devices, and Systems VI, 94500V (6 January 2015); https://doi.org/10.1117/12.2073239

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KEYWORDS

Brain-machine interfaces

Waveguides

Polymers

Multimode interference devices

Signal attenuation

Optical filters

Integrated optics

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