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Passband broadening of integrated arrayed waveguide filters using multimode interference couplers

Passband broadening of integrated arrayed waveguide filters using multimode interference couplers

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Passband broadening of arrayed waveguide filters that are compatible with singlemode fibre is demonstrated using an integrated multimode interference coupler at the entrance to the star coupler. An 8 × 1.6 nm filter is realised for the 1.55 µm band with 0.75 nm-wide –1 dB passbands and –20 dB rejection at >1.7 nm bandwidth.

Inspec keywords: band-pass filters; integrated optics; optical couplers; optical waveguide filters

Other keywords: star coupler; singlemode fibre; multimode interference couplers; integrated arrayed waveguide filters; 1.55 micron; passband broadening

Subjects: Spectral and other filters; Integrated optics; Integrated optics; Optical coatings and filters; Optical waveguides and couplers; Optical waveguides

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