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Multigrating method for flattened spectral response wavelength multi/demultiplexer

Multigrating method for flattened spectral response wavelength multi/demultiplexer

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The authors successfully demonstrate a new method, called a multigrating method, for a flattened spectral response. It uses one-focal-point couplers and several interleaved monomode waveguide gratings. It has a bandwidth of 0.94 nm at –1 dB and of 1.8 nm at –20 dB. The loss penalty due to channel flattening is only 2.2 dB.

Inspec keywords: demultiplexing equipment; optical fibre couplers; wavelength division multiplexing; optical fibre losses; diffraction gratings; multiplexing equipment

Other keywords: 2.2 dB; multigrating method; one-focal-point couplers; flattened spectral response; channel flattening; interleaved monomode waveguide gratings; loss penalty; wavelength multiplexer/demultiplexer

Subjects: Gratings, echelles; Switching centres and equipment; Optical communication; Optical communication devices, equipment and systems; Fibre couplers and connectors; Fibre optics

References

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      • M.R. Amersfoort , C.R. de Boer , F.P.G.M. van Ham , M.K. Smit , P. Demeester , J.J.G.M. van der Tol , A. Kuntze . Phased-array wavelength demultiplexer with a flattened wavelength response. Electron. Lett. , 4 , 300 - 301
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      • A. Rigny , C. Ramus , A. Bruno , Y. Raffle , H. Sik , G. Post , M. Carré , A. Carenco . Tapered-assisted polarisation compensation in efficiently fibre-coupledInP demultiplexer. Electron. Lett. , 20 , 1885 - 1886
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      • Y.P. Ho , H. Li , Y.J. Chen . Flat channel-passband-wavelength multiplexing and demultiplexing devices by multiple-rowland-circile design. IEEE Photonics Technol. Lett. , 3 , 342 - 344
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      • Rigny, A., Bruno, A., Sik, H.: `Double-phased array for a flattened spectral response', ECOC'97, 1997, to be published.
    5. 5)
      • Uetsuka, H., Marra, L.J., Akiba, K., Morosawa, K., Okano, H., Takasugi, S., Inaba, K.: `Recent improvements in arrayed waveguide grating dense wavelength division multi/demultiplexers', ECIO'97, 1997, p. 76–79.
    6. 6)
      • Boerk, , Prel, C., Lerminiaux, C., Trouchet, D., Beguin, A., Maschmeye, R.O.: `Passband flattening of phasar wdm using input and output star couplersdesigned with two focal points', OFC Tech. Dig., 1997, p. 302–303.
    7. 7)
      • LeBlanc , N.C. Andreadaki , A. Rajhel , M.R. Amersfoort , J.B.D. Soole , C. Caneau . Passband broadening of integrated arrayed waveguide filters using a multimode interference couplers. Electron. Lett. , 5 , 449 - 451
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