Optical mode conversion using chirped gratings

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Optical mode conversion using chirped gratings

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© The Institution of Electrical Engineers
Published

A design is presented for a 3 dB TE0-TE1 optical waveguide mode convertor using a chirped grating. Devices were fabricated in Ti in-diffused lithium niobate by ion beam etching the grating pattern into the waveguide surface. TE0-TE1 mode coupling was observed experimentally with an insertion loss of 1.5 dB.

Inspec keywords: integrated optics; diffraction gratings; acousto-optical devices; optical waveguide components

Other keywords: ion beam etching; LiNbO3; chirped grating; insertion loss; Ti; optical waveguide mode convertor

Subjects: Integrated optics; Integrated optics; Optical waveguides; Gratings, echelles; Optical waveguides and couplers; Acousto-optical devices

References

    1. 1)
      • M.G.F. Wilson , G.A. Teh . Tapered optical directional coupler. IEEE Trans. , 85 - 92
    2. 2)
      • W.C. Chang . Periodic structure and their application in integrated optics. IEEE Trans. , 775 - 785
    3. 3)
      • A. Yariv . Coupled-mode theory for guided-wave optics. IEEE J. Quantum Electron. , 919 - 933
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