[1] Vengsarkar A M,Lemaire P J,Judkins J B,et al. Long-period fiber gratings as band-rejection filters [J].Lightwave Technol,1996,14(1): 58-65.
[2] Harurnoto M,Shigehara M,Suganurna H. Gain-flattening filter using long-period fiber gratings [J].Lightwave Technol,2002,20(6): 1027-1033.
[3] Sohn I B,Song J W. Gain flattened and improved double-pass two-stage EDFA using microbending long-period fiber gratings [J].Opt. Comm.,2004,236: 141-144.
[6] Liu Y,Zhang L,Williams J A R,Bennion I. Optical bend sensor based on measurement of resonance mode splitting of long-period fiber grating [J].IEEE Photon. Technol. Lett.,2000,12(5): 531-533.
[9] Kogelnik H. Theory of Optical Waveguides in Guided-Wave Optoelectronics [M].New York: Springer-Verlag,1990.
[10] Erdogan T. Fiber grating spectra [J].Lightwave Technol.,1997,15(8): 1277-1294.
[11] Erdogan T. Cladding-mode resonance in short and long period fiber grating filters[J].Opt. Soc. Am. A.,1997,14(8): 1760-1773.
[12] Marcuse D. Theory of Dielectric Optical Waveguides [M].New York: Academic,1991.
[13] Chen L R. Design of flat-top bandpass filters based on symmetric multiple phase-shifted long-period fiber gratings [J].Opt. Comm.,2002,205: 271-276.