Large-scale wavelength multi/demultiplexer using a spatial grating combined with arrayed waveguide gratings

Akihisa Ohori, Hiroyuki Tsuda

    研究成果: Conference contribution

    抜粋

    The C- and L-bands (1530 nm ∼ 1625 nm) are used for long-haul optical communication systems. The operating wavelength range needs to be extended to realize much broader transmission capacity with a low-cost modulation format. In this paper, we propose a large-scale wavelength multiplexer/demultiplexer using a conventional spatial grating in combination with arrayed-waveguide gratings (AWGs) to cover the whole fiber transmission wavelength range. The diffracted light from the spatial grating is spectrally decomposed and coupled to several AWGs for further demultiplexing. In this study, we designed a multi/demultiplexer which covers the O∼L-bands (186.2 THz ∼ 243.7 THz) with a channel spacing of 100 GHz. This has 9 sub-bands and 576 wavelength channels. The groove density of the spatial grating and the beam diameter on it are assumed to be 300 lines/mm and 1 mm x 1 mm, respectively. The diffracted light is coupled to 9 tapered waveguides on the edge of a planar lightwave circuit (PLC). The shape of the beam is changed by a cylindrical lens, to enhance the coupling efficiency. Each tapered waveguide is connected to an AWG with a center wavelength corresponding to the particular sub-band. AWGs with 64 output channels have a frequency spacing of 100 GHz. The transmission loss in the AWGs was calculated to be between -14.9 dB and -6.6 dB. The relatively large transmission loss was due to misalignment between the beam and the tapered waveguides.

    元の言語English
    ホスト出版物のタイトルOptoelectronic Devices and Integration VIII
    編集者Xuping Zhang, Baojun Li, Changyuan Yu, Xinliang Zhang, Daoxin Dai
    出版者SPIE
    ISBN(電子版)9781510630857
    DOI
    出版物ステータスPublished - 2019 1 1
    イベントOptoelectronic Devices and Integration VIII 2019 - Hangzhou, China
    継続期間: 2019 10 222019 10 23

    出版物シリーズ

    名前Proceedings of SPIE - The International Society for Optical Engineering
    11184
    ISSN(印刷物)0277-786X
    ISSN(電子版)1996-756X

    Conference

    ConferenceOptoelectronic Devices and Integration VIII 2019
    China
    Hangzhou
    期間19/10/2219/10/23

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering

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  • これを引用

    Ohori, A., & Tsuda, H. (2019). Large-scale wavelength multi/demultiplexer using a spatial grating combined with arrayed waveguide gratings. : X. Zhang, B. Li, C. Yu, X. Zhang, & D. Dai (版), Optoelectronic Devices and Integration VIII [1118408] (Proceedings of SPIE - The International Society for Optical Engineering; 巻数 11184). SPIE. https://doi.org/10.1117/12.2538919