光学
光纤布拉格光栅
材料科学
折射法
长周期光纤光栅
飞秒
包层(金属加工)
包层模式
磷
折射率
激光器
光纤
光电子学
光纤传感器
保偏光纤
物理
冶金
作者
Hicham Chikh-Bled,Mohammed Debbal,M. Chikh-Bled,Chamse-Eddine Ouadah,Venancio Calero-Vila,Mouweffeq Bouregaa
出处
期刊:Applied Optics
[The Optical Society]
日期:2019-01-11
卷期号:58 (3): 528-528
被引量:13
摘要
In this paper, we demonstrate point-by-point inscription of eccentric fiber Bragg grating (EFBG) in conventional single-mode fiber (Corning SMF-28) with second-order Bragg resonances within the C-band using an IR femtosecond laser. Highly localized fiber Bragg gratings can be inscribed point-by-point with focused ultrashort pulses. EFBGs are localized close to the core–cladding interface, yielding strong cladding mode resonance couplings and high photoinduced birefringence. The inscription conditions to optimize the grating fabrication have been explored to achieve second-order resonances of good spectral quality. Potential applications of EFBG in refractometry sensing are further illustrated. Two interrogation techniques for EFBG in refractometry are reported and experimentally tested.
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