A simple dispersion measurement of fiber gratings by interferometric technique

Lih Gen Sheu*, Jian Ming Chen, Shang Yi Yu, Kuei Chu Hsu, Meng Chang Tsai, Yin-Chieh Lai

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


A simple dispersion measurement of fiber gratings using an un-balanced Michelson interferometer is proposed. A broadband source and an optical spectrum analyzer are used to scan the interference spectrum, and then the group time delay can be obtained rapidly by Fourier transform processing the interference spectrum. We measured the group time delays of a uniform-period FBG, a chirped FBG, an arrayed-waveguide grating interleaver, and a thin-film filter type OADM by an un-balanced Michelson and Mach-Zehnder interferometers, respectively. The experimental results excellent match the measured results of the optical network analyzer. The experimental repeatability is shown to be better than Ips.

Original languageEnglish
Article number60251X
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2006
EventICO20: Optical Communication - Changshun, China
Duration: 21 Aug 200526 Aug 2005


  • Fiber gratings
  • Fourier transform processing
  • Group time delay
  • Mach-Zehnder interferometer
  • Un-balanced Michelson interferometer


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