Gap FBG and its application in tunable narrow linewidth fiber laser

Yuanhong Yang; Xiaozhe Zhang; Jin-jin Guo; Wei Jin; Mingwei Yang

doi:10.1117/12.974813

17 October 2012 Gap FBG and its application in tunable narrow linewidth fiber laser

Yuanhong Yang, Xiaozhe Zhang, Jin-jin Guo, Wei Jin, Mingwei Yang

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84214J (2012) https://doi.org/10.1117/12.974813
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

A gap fiber 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 tuned by adjusting the air-gap longitudinally or transversely with respect to the fiber center-axis. With a g-FBG as tunable intra-cavity filter, a tunable fiber ring laser with a narrow line-width is demonstrated. The wavelength tuning range of the laser is 0.12 nm with a 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.

Citation Download Citation

Yuanhong Yang, Xiaozhe Zhang, Jin-jin Guo, Wei Jin, and Mingwei Yang "Gap FBG and its application in tunable narrow linewidth fiber laser", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84214J (17 October 2012); https://doi.org/10.1117/12.974813

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