@ARTICLE{comparative2016,
     Title={Comparative study of different optical amplifiers for hybrid passive optical networks},
     Author={Rakesh Goyal, R. S. Kaler, T. S. Kamal},
     Journal={Optoelectronics And Advanced Materials-Rapid Communications},
     Volume={10},
     Number={0},
     Pages={9-11},
     Publisher={},
     Year={2016}
}