Abstract

In this paper, we experimentally introduce a low-loss 3-dimensional (3D) symmetric crossover multimode optical waveguides realized with parabolic graded-index (GI) profiles using the Mosquito method. This compact crossover multimode waveguide is comprised of two S-bend core groups (6 Ch. × 6 Ch.), where the last six cores cross over the first six cores, maintaining a height gap at the crossover section to avoid the smudging from needle scan. The suitable height gap for this crossover multimode structure is 0.7 mm. The insertion loss of this multimode crossover waveguide is 1.64 dB at 850 nm wavelength. The insertion losses of this multimode crossover waveguide are compared with separately fabricated 3D S-bend waveguides, and it indicates that multimode crossover structures do not exhibit remarkable excess loss. The interchannel crosstalk of this waveguide is less than −45 dB. This crossover multimode waveguide demonstrates sharply open optical and electrical eye diagrams and transmits error-free data at 26 Gb/s.

Circular core single-mode 3-dimensional crossover polymer waveguides fabricated with the Mosquito method

Omar Faruk Rasel and Takaaki Ishigure
Opt. Express 27(22) 32465-32479 (2019)

Accurate interchannel pitch control in graded-index circular-core polymer parallel optical waveguide using the Mosquito method

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Opt. Express 22(7) 8426-8437 (2014)

90°-bent graded-index core polymer waveguide for a high-bandwidth-density VCSEL-based optical engine

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Fan-in/out polymer optical waveguide for a multicore fiber fabricated using the Mosquito method

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Opt. Express 23(2) 1585-1593 (2015)

Polymer optical waveguide with multiple graded-index cores for on-board interconnects fabricated using soft-lithography

Takaaki Ishigure and Yosuke Nitta
Opt. Express 18(13) 14191-14201 (2010)