Characterizing Fiber Bragg Grating Index Profiles to Improve the Writing Process

M.J. Espejo, Mikael Svalgaard, S.D. Dyer

Research output: Contribution to journalJournal articleResearchpeer-review


We demonstrate an accurate method for identifying both systematic and random errors in a fiber Bragg grating (FBG) writing system and show its application to calibration of the writing process. We first measure the FBG impulse response using low-coherence interferometry, and then we calculate the refractive index profile using layer peeling. This yields the complex longitudinal refractive index profile, which includes both the index modulation amplitude and the effective index as a function of position along the FBG. We demonstrate how this measurement can be applied to the calibration of a scanning-beam dithered phase mask FBG writing system. We demonstrate the ability to identify errors in the writing process that would not likely be found from a measurement of the FBG reflection spectrum alone.
Original languageEnglish
JournalPhotonics Technology Letters
Issue number21
Pages (from-to)2242-2244
Publication statusPublished - 2006


Dive into the research topics of 'Characterizing Fiber Bragg Grating Index Profiles to Improve the Writing Process'. Together they form a unique fingerprint.

Cite this