@ARTICLE{investigation2014,
     Title={Investigation on wavelength re-modulated bi-directional passive optical network for different modulation formats},
     Author={Simranjit Singh, Amit Kapoor, Gurpreet Kaur, R. S. Kaler, Rakesh Goyal},
     Journal={Optik- International Journal for Light and Electron Optics},
     Volume={125},
     Number={18},
     Pages={5378-5382},
     Publisher={Elsevier},
     Year={2014}
}