Coupling ratio control of polymeric waveguide couplers by bending |
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Authors: | Yoshimura R Nakagome H Imamura S Izawa T |
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Affiliation: | NTT Corp., Ibaraki, Japan; |
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Abstract: | Directional couplers are successfully fabricated on acrylic substrates using polymers synthesised from deuterated methacrylate and deuterated fluoromethacrylate monomers. The excess loss of a 50 mm long coupler is about 0.7 dB including waveguide and fibre coupling losses. A novel method is proposed for tuning the coupling ratio. By bending the coupler, high precision control of within 1% is attained without optical polarisation dependence.<> |
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