Recent advances on multiple channel unequally spaced optical phased array for ultrafast LADAR

Shizhuo Yin, Jae Hun Kim, Jimmy Yao, Paul Ruffin, Eugene Edwards, Christina Brantley, Claire Luo

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Scopus citations

    Abstract

    In this paper, we experimentally verify that previously proposed idea of unequally spaced optical phased array can greatly reduce grating-lobes. As the verification purpose of our previous numerical design, a laser beam is passed through unequally-spaced slits, whose spacings are the same as the previous design. Interference patterns formed after both 4- and 8-channel slits clearly show that the grating-lobes can be greatly minimized. To realize the beam steering possible, optical waveguides array, which has unequally spaced design at the output ends is fabricated. The phase of each beam can be varied using fibers array wound around PZT tubes before each beam is coupled into the waveguides array. Interference patterns formed after the outputs of both 4- and 8-channel waveguides array show that the gratinglobes can be greatly reduced using unequally spaced optical phased array technique.

    Original languageEnglish (US)
    Title of host publicationPhotonic Fiber and Crystal Devices
    Subtitle of host publicationAdvances in Materials and Innovations in Device Applications II
    DOIs
    StatePublished - Nov 12 2008
    EventPhotonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications II - San Diego, CA, United States
    Duration: Aug 12 2008Aug 14 2008

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume7056
    ISSN (Print)0277-786X

    Other

    OtherPhotonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications II
    CountryUnited States
    CitySan Diego, CA
    Period8/12/088/14/08

    All Science Journal Classification (ASJC) codes

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

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  • Cite this

    Yin, S., Kim, J. H., Yao, J., Ruffin, P., Edwards, E., Brantley, C., & Luo, C. (2008). Recent advances on multiple channel unequally spaced optical phased array for ultrafast LADAR. In Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications II [705619] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7056). https://doi.org/10.1117/12.794036