Investigation on temperature characteristics of weak fiber Bragg gratings in a wide range

Xiaojun Fan; Junfeng Jiang; Xuezhi Zhang; Kun Liu; Shuang Wang; Tiegen Liu

doi:10.3788/COL201917.120603

Journals >Chinese Optics Letters >Volume 17 >Issue 12 >Page 120603 > Article

Chinese Optics Letters
Vol. 17, Issue 12, 120603 (2019)

Investigation on temperature characteristics of weak fiber Bragg gratings in a wide range

Xiaojun Fan^1、2、3, Junfeng Jiang^{1、2、3、*}, Xuezhi Zhang^{1、2、3、**}, Kun Liu^1、2、3, Shuang Wang^1、2、3, and Tiegen Liu^1、2、3

Author Affiliations

¹School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China

²Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin 300072, China

³Key Laboratory of Opto-electronics Information Technology, Ministry of Education, Tianjin University, Tianjin 300072, China

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DOI: 10.3788/COL201917.120603 Cite this Article Set citation alerts

Xiaojun Fan, Junfeng Jiang, Xuezhi Zhang, Kun Liu, Shuang Wang, Tiegen Liu. Investigation on temperature characteristics of weak fiber Bragg gratings in a wide range[J]. Chinese Optics Letters, 2019, 17(12): 120603 Copy Citation Text

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(a) Reflection spectra of WFBGs with reflectivity of ∼0.25%, ∼0.5%, ∼1%, ∼5%, and ∼10%. Inset: the reflection spectra of 0.5% and 0.25% reflectivity WFBGs. (b) Photograph of a WFBG encapsulated by a capillary quartz tube.

Fig. 1. (a) Reflection spectra of WFBGs with reflectivity of ∼0.25%, ∼0.5%, ∼1%, ∼5%, and ∼10%. Inset: the reflection spectra of 0.5% and 0.25% reflectivity WFBGs. (b) Photograph of a WFBG encapsulated by a capillary quartz tube.

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(a) Wavelength, (b) reflectivity, and (c) reflection spectra of WFBGs with reflectivity of ∼0.25% in LH2 immersion experiments.

Fig. 2. (a) Wavelength, (b) reflectivity, and (c) reflection spectra of WFBGs with reflectivity of ∼0.25% in

{LH}_{2}

immersion experiments.

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Fig. 3. (a) Temperature during

{LN}_{2}

experiment; the reflectivity of five WFBGs with reflectivity of (b) ∼0.25%, (c) ∼0.5%, (d) ∼1%, (e) ∼5%, and (f) ∼10%.

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Fig. 4. (a) Temperature, (b) reflectivity variation, and (c) wavelength shift of the WFBG with reflectivity of ∼0.25% in silicone oil.

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Fig. 5. Strain test results: (a) strain change, (b) reflectivity variation.

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Fig. 6. Wavelength shifts of WFBGs with different reflectivity from

- 252.75 ° C

to 200.94°C.

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Device	Preset Temperature (°C)	Actual Temperature (°C)
${LH}_{2}$	–	$- 252.75$
${LN}_{2}$	–	$- 195.43$
Alcohol tank	$- 80$	$- 80.06$
Alcohol tank	$- 60$	$- 59.71$
Oven	$- 40$	$- 39.62$
Oven	$- 10$	9.42
Oven	20	19.75
Oven	50	49.06
Oven	80	79.03
Oven	110	107.75
Oven	140	135.10
Oil bath	170	170.27
Oil bath	200	200.94