@INPROCEEDINGS {11136,
author={A. Sousa and C. Marques and R.N.  Nogueira and P.S André},
doi={},
booktitle={Conf. on Telecommunications  - ConfTele},
title={Optical signal to noise ratio monitoring with Hi-Bi fiber Bragg grating},
year={2011},
month={April},
volume={},
pages={1-3} 
}