Title :
Enhancement of resolution of optical spectrum analysers with thermally tuned sampled fibre Bragg grating
Author_Institution :
Dept. of Electr. Eng., Technion-Israel Inst. of Technol., Haifa, Israel
fDate :
10/1/2010 12:00:00 AM
Abstract :
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.
Keywords :
Bragg gratings; optical fibres; optical modulation; reflectivity; spectral analysis; 2N+1 reflected spectra; SFBG; optical spectrum analyser resolution; sampled fibre Bragg grating; spectral modulation method; thermal tuning;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2010.2040
