Improved tuning accuracy of fiber grating lasers using LVDT

W. H. Chung, Hwa Yaw Tam, M. S. Demokan, Ping Kong Alexander Wai

Research output: Journal article publicationConference articleAcademic researchpeer-review


A microprocessor controlled feedback system using a linear variable differential transformer to measure the compression of a fiber Bragg grating with a view to improve the tuning accuracy of a fiber grating laser is reported. This technique overcomes the large hysteresis of the PZT actuator normally used to compress the grating. A tuning range of about 20 nm with a readout wavelength accuracy of better than ±0.05 nm was achieved.
Original languageEnglish
Pages (from-to)272-276
Number of pages5
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1 Dec 2001
EventPhotonic Systems and Applications - Singapore, Singapore
Duration: 27 Nov 200130 Nov 2001


  • Fiber Bragg gratings
  • Fiber lasers
  • Wavelength tuning
  • WDM applications

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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