title: Fabrication of high quality, ultra-long fiber Bragg gratings: up to 2 million periods in phase.
abstract: The fabrication and characterization of high quality ultra-long (up to 1m) fiber Bragg gratings (FBGs) is reported. A moving phase mask and an electro-optic phase-modulation (EOPM) based interferometer are used with a high precision 1-meter long translation stage and compared. A novel interferometer position feedback scheme to simplify the fabrication process is proposed and analyzed. The ultra-long uniform FBGs show near perfect characteristics of a few picometers bandwidth, symmetrical, near theory-matching group-delay and transmission spectra. Grating characterization using optical backscattering reflectometry and chirped FBGs are also demonstrated. Limitations of the schemes are discussed.
authors: Mathieu
authors: M
authors: Gagné
authors: Sébastien
authors: S
authors: Loranger
authors: Jerome
authors: J
authors: Lapointe
authors: Raman
authors: R
authors: Kashyap
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007368:Interferometry / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*