Channel spacing halving and multi-channel apodisation of sampling fiber Bragg grating (SFBG) based onSFBG. The experiment and theoretical analysis showed that the channel spacing could be halved whenfringe was twice t...Channel spacing halving and multi-channel apodisation of sampling fiber Bragg grating (SFBG) based onSFBG. The experiment and theoretical analysis showed that the channel spacing could be halved whenfringe was twice the length of SFBG and the initial phase difference of two exposures was odd times of π.A novel method to control the initial phase difference of two exposures is presented in this paper. Usingthis technique, we fabricated two SFBGs with channel spacing of 50 and 100 G by a same phase mask andan apodized SFBG with channel spacing of 100 G.展开更多
文摘Channel spacing halving and multi-channel apodisation of sampling fiber Bragg grating (SFBG) based onSFBG. The experiment and theoretical analysis showed that the channel spacing could be halved whenfringe was twice the length of SFBG and the initial phase difference of two exposures was odd times of π.A novel method to control the initial phase difference of two exposures is presented in this paper. Usingthis technique, we fabricated two SFBGs with channel spacing of 50 and 100 G by a same phase mask andan apodized SFBG with channel spacing of 100 G.
