Ultrafast-laser-induced negative-index fiber Bragg gratings with enhanced thermal stability

被引：0
|
作者：
He, Jun [1 ]
Liao, Changrui [1 ]
Yang, Kaiming [1 ]
Wang, Yiping [1 ]
机构：
[1] Shenzhen Univ, Coll Optoelect Engn, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Shenzhen 518060, Peoples R China
来源：
2017 25TH INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS (OFS) | 2017年 / 10323卷
基金：
中国国家自然科学基金;
关键词：
Fiber Bragg gratings; ultrafast laser; fiber-optic sensors; FEMTOSECOND LASER; PHASE MASK;
D O I：
10.1117/12.2267526
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Negative-index fiber Bragg gratings (FBGs) were fabricated using 800 nm femtosecond laser overexposure and thermal regeneration. A positive-index type I-IR FBG was first inscribed in H-2-free fiber with a uniform phase mask, and then a highly polarization dependent phase-shifted FBG (PSFBG) was created from the type I-IR FBG by overexposure. Subsequently, the PSFBG was annealed at 800 degrees C for 12 hours. A negative-index FBG was obtained with a reflectivity of 99.22%, an insertion loss of 0.08 dB, a blue-shift of 0.83 nm, and an operating temperature of up to 1000 degrees C.
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页数：4
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