Journal
Scientific and technical journal «Priborostroenie»
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Issue:5 (60)
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FIBER BRAGG GRATINGS INSCRIPTION USING TALBOT INTERFEROMETER AND KrF EXCIMER LASER SYSTEM
Annotation
An experimental setup for the fiber Bragg gratings inscription using Talbot interferometer is described. A KrF excimer laser system CL-7550 of the type “Master Oscillator – Power Amplifier” by Optosystems Ltd., Russia, with enhanced spatial and temporal coherence is applied as the UV radiation source in the experimental setup, which includes laser beam transportation optical system and Talbot interferometer. To ensure the effective recording, the laboratory setup also includes spectral width control system based on Fabry Perot interferometer, laser beam energy distribution control system, monitoring system of laser pulse energy density on the optical fiber, and control system of optical fiber to the laser beam relative position: spectral width control system, based on Fabry-Perot interferometer; laser beam energy distribution control system; monitoring system of laser pulse energy density on the optical fiber; and control system of optical fiber to the laser beam relative position. Results of type I fiber Bragg gratings inscription in single-pulse and multi-pulse modes are presented. Dependence of spectral characteristics of fiber Bragg gratings on various recording conditions are analyzed. A method for experimental investigation of optical fiber relative photo-refractivity is described.
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