Responses of a long-period grating fabricated in a graded-index optical fiber to temperature and refractive-index changes

Femtosecond laser fabrication of long pe

Femtosecond laser fabrication of long period fiber gratings and applications in refractive index sensing

✍ Benye Li; Lan Jiang; Sumei Wang; Hai-Lung Tsai; Hai Xiao 📂 Article 📅 2011 🏛 Elsevier Science 🌐 English ⚖ 490 KB

An improved point-by-point inscription method is proposed to fabricate long period fiber gratings (LPFGs) by using a laser operating at 800 nm with 35 fs duration pulses. The sensitivity to misalignment between the core and the focus is reduced by scanning a rectangular part on the fiber. LPFGs with