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Time delay measurement of chirped fibre grating using bidirectional modulation of Mach-Zehnder modulator

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3 Author(s)
Keum-Soo Jeon ; Div. of Electron. & Inf. Eng., Chonbuk Nat. Univ., Chonju, South Korea ; Hee-Ju Kim ; Jae-Kyung Pan

A simple method for time delay measurement of a chirped fibre grating by using bidirectional modulation of a Mach-Zehnder modulator is proposed. The bidirectionally modulated light with time difference produces an interference fringe in the RF domain. The time delay of a chirped fibre grating can be obtained by measuring the period of the RF interference fringe from different wavelengths.

Published in:

Electronics Letters  (Volume:38 ,  Issue: 23 )