Recent advances on all-fiber tunable filter

S. Yin, K. M. Reichard, J. E. Lee, C. A. Hahn, D. H. Ditto, J. Mazurowski, Q. Wang, S. Nam, Q. Zhang, Q. Chen, J. Claude

Research output: Contribution to journalConference articlepeer-review


A unique all-fiber tunable filter is based on the combination of a single resonant band long period grating (LPG) and an electro-optic polymer second cladding layer. The single resonant band LPG is fabricated by etching the cladding of a standard 125 μm thick fiber and using either ultraviolet (UV) illumination or electric arc discharge to write the grating. Once a single resonant band has been achieved, a polymer second cladding layer is applied to the LPG. The refractive index of the polymer cladding determines the resonant wavelength of the filter and is tuned by applying an external electric field. The grating fabrication method and type of polymer used for the second cladding affect filter performance, and both must be considered when designing an application specific all-fiber filter.

Original languageEnglish (US)
Article number59110V
Pages (from-to)1-11
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2005
EventPhotorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications XI - San Diego, CA, United States
Duration: Jul 31 2005Aug 1 2005

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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