Title :
Reduction of Power Fluctuation in Pulsed Lightwave Frequency Sweepers With SOA Following EDFA
Author :
Takano, Katsumi ; Nakagawa, Kiyoshi ; Takahashi, Yutaka ; Ito, Hiromasa
Author_Institution :
Dept. of Electr. Eng., Yamagata Univ.
fDate :
4/1/2007 12:00:00 AM
Abstract :
A pulsed lightwave frequency sweeper is a frequency source with linear frequency scanning. It can be made using a fiber ring with an acoustooptic frequency shifter and an optical amplifier. The drawback of this sweeper, however, is optical power fluctuation that is attributable to power feedback to the erbium-doped fiber amplifier (EDFA) by the fiber ring. This study presents suppression of the fluctuation by tandem configuration of optical amplifiers, such as EDFA and semiconductor optical amplifiers in this order, in the fiber ring. The configuration was demonstrated experimentally and its noise performance was evaluated by changing the operation point of the amplifiers
Keywords :
acousto-optical switches; erbium; fluctuations; frequency synthesizers; laser beam applications; laser noise; optical fibre amplifiers; optical fibre testing; semiconductor optical amplifiers; acoustooptic frequency shifter; acoustooptic switches; erbium-doped fiber amplifier; fiber ring; frequency synthesizers; laser noise performance; laser power feedback; optical fiber measurement; optical power fluctuation; power fluctuation reduction; pulsed lightwave frequency sweepers; semiconductor optical amplifier; tandem laser configuration; Erbium-doped fiber amplifier; Fluctuations; Frequency; Optical feedback; Optical fiber amplifiers; Optical noise; Optical pulses; Pulse amplifiers; Semiconductor optical amplifiers; Stimulated emission; Acoustooptic switches; frequency synthesizers; optical fiber amplifiers; optical fiber measurements;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.893830
