[3] Jake B,Karsten R,Lines M E.A method to predict the Raman gain spectra of germanosilicate fibers with arbitrary index profiles [J].IEEE Photonics Technology Lett.,2002,14(1):24-26.
[4] Kunihiro T,Kazuo H,Tsuneo H.Measurement of Raman gain distri-bution in optical fibers [J].IEEE Photonics Technology Lett.,2002,14(7):974-976.
[6] Davey S T,Williams D L,Ainslie B J,et al.Optical gain of GeO2-SiO2 Raman fiber amplifiers [J].IEEE Proceedings,1989,136(6):302-306.