Multistage polymeric lens structures integrated into silica waveguides

Atsushi Tate, Takanori Suzuki, Hiroyuki Tsuda

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    Abstract

    A waveguide lens, composed of multistage polymer-filled thin grooves in a silica planar lightwave circuit (PLC) is proposed and a low-loss structure has been designed. A waveguide lens in a silica slab waveguide has been fabricated using reactive ion etching (RIE) and formed by filling with polymer. Both an imagding optical system and a Fourier-transform optical system can be configured in a PLC using a waveguide lens. It renders the PLC functional and its design flexible. To obtain a shorter focal length with a low insertion loss, it is more effective to use a multistage lens structure. An imaging optical system and a Fourier-transform optical system with a focal length of less than 1000 um were fabricated in silica waveguides using a multistage lens structure. The lens imaging waveguides incorporate a 16-24-stage lens, with insertion losses of 4-7dB. A 4 × 4 optical coupler, using a Fourier-transform optical system, utilizes a 6-stage lens with losses of 2-4dB.

    Original languageEnglish
    Pages (from-to)6288-6293
    Number of pages6
    JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
    Volume45
    Issue number8 A
    DOIs
    Publication statusPublished - 2006 Aug 4

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    Keywords

    • Collimating lens
    • Imaging lens
    • Integrated optics
    • Multistage lens
    • Optical coupler
    • Silica waveguide

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

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