Optical switch driven by giant magnetostrictive thin films

S. Moon, Sang Ho Lim, S. B. Lee, H. K. Kang, M. C. Kim, S. H. Han, M. H. Oh

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

Optical 1×N switches which can be operated by Giant Magnetostrictive Thin Film under the magnetic field are firstly investigated. Bulk micromachining and deposition of magnetostrictive thin film was used for fabrication of a 1×N cantilever-type optical switch. Optical switching operation induced by magnetostriction was examined through optical path modulation test. The optical path can be redirected and exactly positioned by wide reflection-angle change of light with cantilever deflection. Deflection of cantilever by magnetostriction was significantly improved in our developed Re-Fe thin film system. In this report, Giant magnetostrictive thin films of amorphous Tb-Fe and Sm-Fe based alloys exhibiting excellent magnetostrictive characteristics at low magnetic fields are developed from a systematic investigation with a particular emphasis being placed to examine B effects. Magnetostrictions of 173 ppm and - 585 ppm are achieved in B containing Tb-Fe and Sm-Fe thin films, respectively, at a magnetic field of 100 Oe. Switching characteristics of our cantilever-type optical switch were evaluated using optical fiber under laser-optic test system. Optical path change of 6° was achieved under stable switching operation and was considered to increase the number of communication channels for construction of fiber optical network application.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages854-862
Number of pages9
Volume3680
EditionII
Publication statusPublished - 1999
Externally publishedYes
EventProceedings of the 1999 Design, Test, and Microfabrication of MEMS and MOEMS - Paris
Duration: 1999 Mar 301999 Apr 1

Other

OtherProceedings of the 1999 Design, Test, and Microfabrication of MEMS and MOEMS
CityParis
Period99/3/3099/4/1

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Moon, S., Lim, S. H., Lee, S. B., Kang, H. K., Kim, M. C., Han, S. H., & Oh, M. H. (1999). Optical switch driven by giant magnetostrictive thin films. In Proceedings of SPIE - The International Society for Optical Engineering (II ed., Vol. 3680, pp. 854-862). Society of Photo-Optical Instrumentation Engineers.