Title :
Improving measurement sensitivity of the raman gain coefficient in optical fibres using pump/signal simultaneous lock-in detection
Author_Institution :
Nat. Inst. of Inf. & Commun. Technol., Tokyo
fDate :
9/28/2006 12:00:00 AM
Abstract :
A highly sensitive method for measuring the Raman gain coefficient using short lengths of optical fibre is demonstrated. Square-wave modulation is applied to both the pump and the signal, and lock-in detection is performed at the sum modulation frequency. A Raman on/off gain as small as 0.0015 dB can be readily measured
Keywords :
Raman spectra; gain measurement; optical fibre testing; optical variables measurement; Raman gain coefficient; measurement sensitivity; optical fibres; pump/signal simultaneous lock-in detection; square-wave modulation; sum modulation frequency;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20061915
