[1] ERDOGAN T.Fiber grating spectra[J].Journal of the Lightwave Technology,1997,15(8):1277-1294.
[3] AGRAWAL G P,BOBECK A H.Modeling of distributed feedback semiconductor lasers with axially-varying parameters[J].IEEE J Quantum Electron,1988,24(12):2407-2414.
[4] GOVIND P A,STOJAN R.Phase-shifted fiber bragg gratings and their application forwavelength demultiplexing[J].Photonics Technology Letters,1994,6(8):995-997.