Study on polarization spectrum and annealing properties of 45&#176;-tilted fiber gratings

Xi Guo; Zhikun Xing; Huabao Qin; Qizhen Sun; Deming Liu; Lin Zhang; Zhijun Yan

doi:10.3788/COL201917.050601

Journals >Chinese Optics Letters >Volume 17 >Issue 5 >Page 050601 > Article

Chinese Optics Letters
Vol. 17, Issue 5, 050601 (2019)

Study on polarization spectrum and annealing properties of 45°-tilted fiber gratings

Xi Guo¹, Zhikun Xing¹, Huabao Qin¹, Qizhen Sun¹..., Deming Liu¹, Lin Zhang² and Zhijun Yan^1,*|Show fewer author(s)

Author Affiliations

¹School of Optical and Electronic Information, National Engineering Laboratory for Next Generation Internet Access System, Huazhong University of Science and Technology, Wuhan 430074, China

²Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, UK

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DOI: 10.3788/COL201917.050601 Cite this Article Set citation alerts

Xi Guo, Zhikun Xing, Huabao Qin, Qizhen Sun, Deming Liu, Lin Zhang, Zhijun Yan, "Study on polarization spectrum and annealing properties of 45°-tilted fiber gratings," Chin. Opt. Lett. 17, 050601 (2019) Copy Citation Text

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Abstract

We have investigated the whole polarization-extinction-ratio (PER) spectrum and annealing properties of 45°-tilted fiber gratings (45°-TFGs). Experimental results show the PER spectrum of 45°-TFGs is a Gaussian-like profile and covers a 540 nm bandwidth from 1260 to 1800 nm, in which the bandwidth with PER greater than 10 dB is over 250 nm. The output polarization distribution of 45°-TFGs was analyzed by employing a bulk linear polarizer, and the results show a perfect figure “8”, which indicates that the 45°-TFG is a type of linear polarizer. Moreover, the annealing property of 45°-TFGs was measured up to 700°C, in which the PER of the grating started to decrease at 300°C and reached the minimum at 700°C. Based on these results, the 45°-TFGs can be used as an ultra-wide bandwidth in-fiber polarizing device.