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

3 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 - 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
Country/TerritoryUnited 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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