Compact all-fibre wavelength drop and insert filter

Cullen, Thomas J.; Rourke, H.N.; Chew, C.P.; Baker, S.R.; Bricheno, T.; Byron, K.C.; Fielding, A.

doi:10.1049/el:19941471

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1996

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Cited by 14 publications

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“…Optical communication using wavelength division multiplexing requires many optical devices capable of adding, dropping, and filtering light. [1][2][3][4][5][6] A directional coupler is one of the most important elements for such purposes. Two different types of directional coupler, namely, the opticalfiber type 2,7) and planar-lightwave-circuit (PLC) type 8) are on the market.…”

Section: Introductionmentioning

confidence: 99%

Control of Coupling Ratio by Proton Implantation for a Directional Coupler of Planar-Lightwave-Circuit Type

Yu¹,

Suzuki²,

Ohki³

et al. 2009

Jpn. J. Appl. Phys.

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By implanting protons into a cladding in the coupling region of a directional coupler of the planar-lightwave-circuit type at an acceleration energy that enables the protons to reach the center of the core, the coupling ratio of the coupler is changed periodically and continuously by increasing proton fluence. In the case of two optical waveguides formed in a planar lightwave circuit with a mutual spacing too large for optical coupling, proton implantation into the cladding between the waveguides induces optical coupling between them. These results indicate that the coupling ratio of a directional coupler can be controlled by ion implantation.

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