Gap FBG and its application in tunable narrow linewidth fibre laser

Yuanhong Yang; Xuejing Liu; Xiaozhe Zhang; Wei Jin; Mingwei Yang

doi:10.1016/j.optlastec.2013.06.038

Gap FBG and its application in tunable narrow linewidth fibre laser

Yuanhong Yang, Xuejing Liu, Xiaozhe Zhang, Wei Jin, Mingwei Yang

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

6 Citations (Scopus)

Abstract

A gap fibre Bragg grating (g-FBG) is fabricated by cutting a uniform FBG in the middle to introduce a small air gap between the two sections. Numerical and experimental investigations show that the g-FBG has the characteristics of both a phase shifted FBG and a Fizeau interferometer. The peak transmission wavelength of the g-FBG can be finely tuned by adjusting the air-gap longitudinally or transversely with respect to the fibre central axis. With a g-FBG as tunable intra-cavity filter, a tunable fibre ring laser with a narrow line-width is demonstrated. The wavelength tuning range of the laser is 0.12 nm with an output power flatness better than 0.9 dB. The 3 dB spectral line-width is less than 12 pm and output power is 3.68 dBm.

Original language	English
Pages (from-to)	114-118
Number of pages	5
Journal	Optics and Laser Technology
Volume	56
DOIs	https://doi.org/10.1016/j.optlastec.2013.06.038
Publication status	Published - 1 Jan 2014

Keywords

Bragg grating
Fibre ring laser
Gap fibre
Tunable filter

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

More information

10.1016/j.optlastec.2013.06.038

Cite this

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title = "Gap FBG and its application in tunable narrow linewidth fibre laser",

abstract = "A gap fibre Bragg grating (g-FBG) is fabricated by cutting a uniform FBG in the middle to introduce a small air gap between the two sections. Numerical and experimental investigations show that the g-FBG has the characteristics of both a phase shifted FBG and a Fizeau interferometer. The peak transmission wavelength of the g-FBG can be finely tuned by adjusting the air-gap longitudinally or transversely with respect to the fibre central axis. With a g-FBG as tunable intra-cavity filter, a tunable fibre ring laser with a narrow line-width is demonstrated. The wavelength tuning range of the laser is 0.12 nm with an output power flatness better than 0.9 dB. The 3 dB spectral line-width is less than 12 pm and output power is 3.68 dBm.",

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author = "Yuanhong Yang and Xuejing Liu and Xiaozhe Zhang and Wei Jin and Mingwei Yang",

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TY - JOUR

T1 - Gap FBG and its application in tunable narrow linewidth fibre laser

AU - Yang, Yuanhong

AU - Liu, Xuejing

AU - Zhang, Xiaozhe

AU - Jin, Wei

AU - Yang, Mingwei

PY - 2014/1/1

Y1 - 2014/1/1

N2 - A gap fibre Bragg grating (g-FBG) is fabricated by cutting a uniform FBG in the middle to introduce a small air gap between the two sections. Numerical and experimental investigations show that the g-FBG has the characteristics of both a phase shifted FBG and a Fizeau interferometer. The peak transmission wavelength of the g-FBG can be finely tuned by adjusting the air-gap longitudinally or transversely with respect to the fibre central axis. With a g-FBG as tunable intra-cavity filter, a tunable fibre ring laser with a narrow line-width is demonstrated. The wavelength tuning range of the laser is 0.12 nm with an output power flatness better than 0.9 dB. The 3 dB spectral line-width is less than 12 pm and output power is 3.68 dBm.

AB - A gap fibre Bragg grating (g-FBG) is fabricated by cutting a uniform FBG in the middle to introduce a small air gap between the two sections. Numerical and experimental investigations show that the g-FBG has the characteristics of both a phase shifted FBG and a Fizeau interferometer. The peak transmission wavelength of the g-FBG can be finely tuned by adjusting the air-gap longitudinally or transversely with respect to the fibre central axis. With a g-FBG as tunable intra-cavity filter, a tunable fibre ring laser with a narrow line-width is demonstrated. The wavelength tuning range of the laser is 0.12 nm with an output power flatness better than 0.9 dB. The 3 dB spectral line-width is less than 12 pm and output power is 3.68 dBm.

KW - Bragg grating

KW - Fibre ring laser

KW - Gap fibre

KW - Tunable filter

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U2 - 10.1016/j.optlastec.2013.06.038

DO - 10.1016/j.optlastec.2013.06.038

M3 - Journal article

SN - 0030-3992

VL - 56

SP - 114

EP - 118

JO - Optics and Laser Technology

JF - Optics and Laser Technology

ER -

Gap FBG and its application in tunable narrow linewidth fibre laser

Abstract

Keywords

ASJC Scopus subject areas

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