中国激光, 2020, 47 (8): 0806001, 网络出版: 2020-08-17
基于三个非对称光纤布拉格光栅的双腔窄带宽双波长透射 
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Ultranarrow Dual-Transmission Properties of a Two-Cavity Structure Based on Three Asymmetric Fiber Bragg Gratings
图 & 表
图 1. 由N个FBG构成的N-1个谐振腔结构示意图
Fig. 1. Schematic diagram of the (N-1)-cavity structure formed by N-FBG
图 2. 三个FBG构成的双腔透射谱(实线)和对应的禁带(虚线)。(a)三个FBG的周期相同;(b)三个FBG的周期不同
Fig. 2. Transmission spectra (solid lines) and corresponding stop bands (dashed lines) of a two-cavity structure composed of three FBGs. (a) Three FBGs with the same period; (b) three FBGs with different periods
图 3. 增加腔长后,三个FBG构成的双腔透射谱(实线)和对应的禁带(虚线)。(a)三个FBG的周期相同; (b)三个FBG的周期不同
Fig. 3. Transmission spectra (solid lines) and corresponding stop bands (dashed lines) of a two-cavity structure composed of three FBGs when the cavity lengths are elongated. (a) Three FBGs with the same period; (b) three FBGs with different periods
图 4. 改变三个FBG的布拉格波长得到透射波长间隔的改变(实线),虚线为三个FBG对应的禁带
Fig. 4. Wavelength spacing versus Bragg wavelengths of the three FBGs (solid line), and stop bands of the three FBGs (dashed lines)
图 5. 折射率调制Δn增大时双腔结构的透射谱(实线)和对应的禁带(虚线)
Fig. 5. Transmission spectra (solid lines) and corresponding stop bands (dashed lines) of a two-cavity structure composed of three FBGs when the refractive index modulation Δn is increased
图 6. 四个非对称FBG构成的三腔结构的不等间隔三波长透射谱(实线)和对应的禁带(虚线)
Fig. 6. Triple-transmission with unequal spacings (solid lines) and corresponding stop bands (dashed lines) of a three-cavity structure composed of four asymmetric FBGs
图 7. 腔长精度对λ1=1549.85 nm透射峰的影响。(a)腔长较短时;(b)腔长较长时
Fig. 7. Influence of the accuracy of the cavity length on the transmission at wavelength of λ1=1549.85 nm. (a) In the case when cavity is relatively short; (b) in the case when cavity is relatively long
陈建, 邓立, 钮月萍, 龚尚庆. 基于三个非对称光纤布拉格光栅的双腔窄带宽双波长透射[J]. 中国激光, 2020, 47(8): 0806001. Chen Jian, Deng Li, Niu Yueping, Gong Shangqing. Ultranarrow Dual-Transmission Properties of a Two-Cavity Structure Based on Three Asymmetric Fiber Bragg Gratings[J]. Chinese Journal of Lasers, 2020, 47(8): 0806001.
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