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Enhancement of resolution of optical spectrum analysers with thermally tuned sampled fibre Bragg grating

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1 Author(s)
N. K. Berger ; Department of Electrical Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel

A method for at least a tenfold enhancement of the resolution of optical spectrum analysers (OSAs) is proposed and numerically demonstrated. The light to be measured is reflected from a sampled fibre Bragg grating (SFBG) consisting of N apodised equally spaced gratings. Recording 2N + 1 reflected spectra by an OSA for different temperatures of the SFBG and performing simple processing, the spectrum with improved resolution is obtained.

Published in:

Electronics Letters  (Volume:46 ,  Issue: 21 )