Fabrication of Phase-shifted fiber Bragg grating by using femtosecond laser irradiation

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Important Dates

Conference:

Aug. 18-20, 2018

Full Paper Due: Jul. 20, 2018

Abstract Due: Jul. 20, 2018

Audience Registration Due:
Aug. 18, 2018

Presentations of The Int'l Symposium on Photonics and Optoelectronics (SOPO 2016)

● Fabrication of Phase-shifted fiber Bragg grating by using femtosecond laser irradiation
Author(s)
Tao Chen
Affiliation(s)
School of Electronics & Information Engineering, Xi’an Jiaotong University
KEYWORDS
Phase-shifted fiber, femtosecond laser irradiation
ABSTRACT
Phase-shifted fiber Bragg gratings (PSFBG) have found wide applications in optical fiber switch, distributed feedback lasers, optical fiber filter, wavelength division multiplexing and so on. Usually, fabrications of PSFBG involve an elaborate setup. In addition, PSFBG could only be fabricated in photosensitive fibers. In this paper, we demonstrated a method of fabricating PSFBG by using femtosecond laser irradiation. The phase-shifted zone was formed by using femtosecond laser raster scanning in FBG. Phase shift could be varied by changing the area of femtosecond laser scanning zone and laser power. When the scanning length along fiber axis was fixed, phase shift could be accurately varied from 0 to 2π by control the scanning line numbers. In addition, phase shifted also increased with the increase of the length of the phase-shifted zone. With the increase of laser power, phase shift of PSFBG also increased, but loss was also increased. This method was meaningful for fabricating PSFBG in fibers without photosensitivity.