DOAJ Open Access 2019

Point-by-Point Femtosecond-Laser Inscription of 2-<italic>μ</italic>m-Wavelength-Band FBG Through Fiber Coating

Wei He Lianqing Zhu Wen Zhang Feng Liu Mingli Dong

Abstrak

We propose a point-by-point inscription method for fiber Bragg grating (FBG) fabrication using a femtosecond pulsed laser focused through a fiber polyimide coating, realizing a 2-<italic>μ</italic>m-wavelength-band FBG. A femtosecond laser acts as the inscription laser, focused by a 63× oil lens. A first-order FBG was fabricated with a grating interval of 700 nm. The 15-<italic>μ</italic>W pulsed laser was focused directly on the fiber core through the polyimide coating and cladding. A first-order FBG for 2004.8-nm light with more than 56% reflectances was fabricated. High wavelength sensitivity and linearity of the FBG were demonstrated by temperature and strain-sensing testing. The first-order FBG of 2004.8 and 2000.2 nm resonant wavelengths could be realized simultaneously through parallel inscription method in 3000 <italic>μ</italic>m long grating area.

Topik & Kata Kunci

Applied optics. Photonics Optics. Light

Penulis (5)

Wei He

Lianqing Zhu

Wen Zhang

Feng Liu

Mingli Dong

Format Sitasi

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He, W., Zhu, L., Zhang, W., Liu, F., Dong, M. (2019). Point-by-Point Femtosecond-Laser Inscription of 2-<italic>μ</italic>m-Wavelength-Band FBG Through Fiber Coating. https://doi.org/10.1109/JPHOT.2018.2881437

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