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Tunable filter with box-like spectral response for 1.28/1.32 µm duplexer application

Tunable filter with box-like spectral response for 1.28/1.32 µm duplexer application

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The design and realisation on InP of a meander-type grating-assisted codirectional coupler optical filter exhibiting a 40 nm box-like spectral response with high sidelobe suppression and reduced anisotropy is reported. A thermal tuning range larger than 20 nm is electrically realised.

Inspec keywords: optical tuning; band-pass filters; diffraction gratings; optical directional couplers; multiplexing equipment; integrated optics; optical waveguide filters

Other keywords: meander-type; grating-assisted filter; InP; box-like spectral response; InGaAsP-InP; high sidelobe suppression; duplexer application; 1.32 micron; thermal tuning range; 1.28 micron; InP substrate; tunable filter; codirectional coupler optical filter; anisotropy reduction

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

References

    1. 1)
      • H. Sakata . Sidelobe suppression in grating-assisted wavelength-selective couplers. Opt. Lett. , 463 - 465
    2. 2)
      • François, S., Filoche, M., Huet, F., Fouchet, S., Hervé-Gruyer, G., Ougazzaden, A., Brandon, J., Bouadma, N., Carré, M., Carenco, A.: `High sidelobes suppression ratio in a directional coupler optical filter', Proc. ECIO 95, 1995, p. 315–318.
    3. 3)
      • R.C. Alferness , P.S. Cross . Filter characteristics of codirectionally coupled waveguides with weightedcoupling. IEEE J. Quantum Electron. , 11 , 843 - 847
    4. 4)
      • B.E. Little , C. Wu , W.-P. Huang . Synthesis of ideal window filter response in grating-assisted couplers. Opt. Lett. , 10 , 725 - 727
    5. 5)
      • G.-H. Song . Toward the ideal codirectional Bragg filter with an acousto-optic-filterdesign. J. Lightwave Technol. , 3 , 470 - 480
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