21 February 2017 Fabricating phase-shifted fiber Bragg grating by simple postprocessing using femtosecond laser
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Abstract
Fabricating of phase-shifted fiber Bragg grating (PSFBG) by a femtosecond (fs) laser postprocessing of standard single mode fiber Bragg grating (FBG) without phase mask is demonstrated. A central region of grating is irradiated by an fs laser assisted with a rotating jig, which produces a π phase shift at the central region of the grating and forms a π phase-shifted FBG. The procedure is simple, fast, and has good reproductivity. The bandwidth of transmission peak of PSFBG grows with an increasing amount of laser energy or length of irradiation and decreasing of translation speed; the transmission loss decreases with increasing irradiation length. Additionally, the repeatability of fs postprocessing and temperature stability of PSFBG were investigated.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Xian Zhou, Yutang Dai, Joseph Muna Karanja, Fufei Liu, Minghong Yang, "Fabricating phase-shifted fiber Bragg grating by simple postprocessing using femtosecond laser," Optical Engineering 56(2), 027108 (21 February 2017). https://doi.org/10.1117/1.OE.56.2.027108 . Submission: Received: 29 September 2016; Accepted: 23 January 2017
Received: 29 September 2016; Accepted: 23 January 2017; Published: 21 February 2017
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