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Package for fiber Bragg gratings (FBG) and a comparative study on their polarization mode dispersion (PMD) at varying temperature

Ning T., Pei L., Liu Y., Tan Z., Wang Q., Zheng J., Jian S.

Optica Applicata

2005

Vol. 35, nr 2

277-282

A temperature-compensated material of fiber Bragg grating (FBG), which has negative thermal -expansion coefficient has been presented. The temperature coefficient of FBGs' center wavelength is less than 0.0005 nm/°C after three-layer-structure temperature-compensated package under tension. For the first time, PMD of FBG with and without temperature compensation has been detailedly studied and measured from -20 to 60°C. The measured result shows that the PMD changes a little at varying temperature, which means that the package did not affect the PMD characteristic of FBG.

All optical method to achieve gain-clamping in broadband distributed fiber Raman amplifiers

Wei H., Tong Z., Wang M., Jian S.

Optica Applicata

2004

Vol. 34, nr 3

365-372

In this paper, we proposed that using a pair of fiber gratings in a section of the transmission fiber, a gain clamped broadband distributed fiber Raman amplifiers (DRA) can easily be made based on the utilization of the pumps’ interactions and uneven gain property along the fiber in the amplifier