Laser & Optoelectronics Progress, Volume. 54, Issue 6, 61406(2017)
Femtosecond Laser Fabrication and Sensing Performance of Birefringence Fiber Bragg Gratings
A panda-type birefringence fiber Bragg grating (PF-FBG) is fabricated by femtosecond laser direct writing technique. To get the grating, the femtosecond laser is focused into optical fiber core. During the process of exposure, the optical fiber is moved at a constant speed. Finally, a periodic refractive index modulation area is obtained. Because of the birefringence characteristics of PF-FBG, the reflection spectrum with two peaks is generated at 1550 nm wavelength. As a result, it can be used in multi-parameter sensing monitoring. The sensing properties of temperature and axial stress of the PF-FBG are studied. Besides, the femtosecond laser induced grating shows a good stability in high temperature, and shows potential applications in chemical and physical sensing under harsh circumstances.
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Meng Aihua, Cui Dingyuan, Zhang Xuanyu, Chen Chao, Yu Yongsen. Femtosecond Laser Fabrication and Sensing Performance of Birefringence Fiber Bragg Gratings[J]. Laser & Optoelectronics Progress, 2017, 54(6): 61406
Category: Lasers and Laser Optics
Received: Jan. 21, 2017
Accepted: --
Published Online: Jun. 8, 2017
The Author Email: Aihua Meng (jlumah2012@163.com)