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Analysis and design of highly broad-band, planar evanescent couplers

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Abstract

It is shown that by taking advantage of the maximum in the spectral dependence of the coupling coefficient, very broad-band symmetric and asymmetric single-mode planar couplers can be designed. The symmetric coupler allows at least 95.6% coupling between the two cores over the wavelength range 1.3–1.58 μm, while the asymmetric coupler can act as a 3 dB splitter with only ±1.6% variation in the splitting ratio over the wavelength range 1.3–1.67 μm. In both cases, the design includes the curved input-output arms, and the estimated bend loss is approximately 0.1 dB.

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Authors and Affiliations

  1. Optical Sciences Centre, Institute of Advanced Studies, The Australian National University, 0200, Canberra, ACT, Australia

    S. J. Hewlett, J. D. Love & V. V. Steblina

Authors
  1. S. J. Hewlett
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  2. J. D. Love
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  3. V. V. Steblina
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Hewlett, S.J., Love, J.D. & Steblina, V.V. Analysis and design of highly broad-band, planar evanescent couplers. Opt Quant Electron 28, 71–81 (1996). https://doi.org/10.1007/BF00578552

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  • DOI: https://doi.org/10.1007/BF00578552

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