Journal of Nanoparticle Research

, Volume 12, Issue 1, pp 293–300 | Cite as

Study on magnetic fluid optical fiber devices for optical logic operations by characteristics of superparamagnetic nanoparticles and magnetic fluids

  • J. J. Chieh
  • C. Y. Hong
  • S. Y. Yang
  • H. E. Horng
  • H. C. Yang
Research Paper


We propose two optical fiber-based schemes using two magnetic fluid optical fiber modulators in series or in parallel for optical logic signal processing and operation. Here, each magnetic fluid optical fiber modulator consists of a bare multimode fiber surrounded by magnetic fluid in which the refractive index is adjustable by applying external magnetic fields amplifying the input electrical signal to vary the transmission intensity of the optical fiber-based scheme. The physical mechanisms for the performances of the magnetic fluid optical fiber devices, such as the transmission loss related to Boolean number of the logic operation as well as the dynamic response, are studied by the characteristics of superparamagnetic nanoparticles and magnetic fluids. For example, in the dynamic response composed of the retarding and response sub-procedures except the response times of the actuation coil, the theoretical evaluation of the retarding time variation with cladding magnetic fluids length has good agreement with the experimental results.


Magnetic fluid Optical fiber modulator Superparamagnetic nanoparticles Refractive index Colloids 


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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.Institute of Electro-optical Science and TechnologyNational Taiwan Normal UniversityTaipeiTaiwan, ROC
  2. 2.Department of Mechanical EngineeringNan-Kai University of TechnologyNantou CountyTaiwan, ROC
  3. 3.Department of PhysicsNational Taiwan UniversityTaipeiTaiwan, ROC

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