The dual-wavelength ratio temperature measurement through helical long-period gratings

Quanzhen Bao; Yunfeng Bai

doi:10.1117/12.2592294

26 January 2021 The dual-wavelength ratio temperature measurement through helical long-period gratings

Quanzhen Bao, Yunfeng Bai

Proceedings Volume 11767, 2020 International Conference on Optoelectronic Materials and Devices; 117670I (2021) https://doi.org/10.1117/12.2592294
Event: 2020 International Conference on Optoelectronic Materials and Devices, 2020, Guangzhou, China

Abstract

Helically twisted long-period fiber gratings (H-LPFG) of the single-mode fiber provided by Yofc inc is spiral processed by commercial welding machine. There is an obvious second-order resonant dip near 1526 nm coupling between the fundamental mode and the LP₁₅ cladding mode when the pitch length is about 757 μm. The half peak width is about 15 nm, and the resonant dip is about -28 dB. The transmission intensity ratio of 10lg(I_1523.4nm/_I1537nm) and 10lg(I_1523.4nm/_I1551.1nm) versus temperature are measured, which show linearly with temperature. The radio sensitivity of I_1523.4nm/I_1537nm is about 0.023/C° compared with the wavelength sensitivity of about 45 pm/C°. This can be applied in temperature sensor.

Citation Download Citation

Quanzhen Bao and Yunfeng Bai "The dual-wavelength ratio temperature measurement through helical long-period gratings", Proc. SPIE 11767, 2020 International Conference on Optoelectronic Materials and Devices, 117670I (26 January 2021); https://doi.org/10.1117/12.2592294

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