LPFG和FBG級聯(lián)結(jié)構(gòu)雙參數(shù)光纖傳感器研究
發(fā)布時間:2019-01-28 06:58
【摘要】:提出了一種長周期光纖光柵(LPFG)級聯(lián)布拉格光纖光柵(FBG)的溫度/應(yīng)變雙參數(shù)光纖傳感器。利用飛秒激光直寫制作LPFG并級連FBG,且FBG波谷位置為1 551.9 nm,LPFG波谷位置為1 559.1 nm,最高對比度為-12.7 d B。在30~70℃溫度變化范圍內(nèi)對傳感器溫度特性進行測試,并在25℃超凈環(huán)境下對0~500με應(yīng)變變化范圍內(nèi)對傳感器應(yīng)變特性進行測試。實驗結(jié)果表明,升溫過程FBG中心波長發(fā)生紅移,靈敏度15.00 pm/℃,線性度0.981 3;LPFG中心波長發(fā)生藍移,靈敏度-11.75 pm/℃,線性度0.945 3。降溫過程FBG中心波長發(fā)生藍移,靈敏度18.25 pm/℃,線性度0.953 8;LPFG中心波長發(fā)生紅移,靈敏度-15.42 pm/℃,線性度0.980 2。加載過程FBG中心波長發(fā)生紅移,靈敏度0.93 pm/με,線性度0.991 5;LPFG中心波長發(fā)生藍移,靈敏度-1.51 pm/με,線性度0.986 3。卸載過程FBG中心波長發(fā)生藍移,靈敏度0.92 pm/με,線性度0.990 9;LPFG中心波長發(fā)生紅移,靈敏度-1.51 pm/με,線性度0.972 8。結(jié)果表明,該光纖傳感器靈敏度高,線性度好,可以同時動態(tài)實現(xiàn)應(yīng)變和溫度的測量。
[Abstract]:A temperature / strain two-parameter fiber sensor based on long-period fiber Bragg grating (LPFG) cascaded fiber Bragg grating (FBG) is proposed. The femtosecond laser direct writing is used to fabricate LPFG contiguous FBG, with the FBG trough position of 1 551.9 nm,LPFG and the highest contrast of -12.7 dB at 1 559.1 nm,. The temperature characteristics of the sensor were measured in the range of 30 鈩,
本文編號:2416814
[Abstract]:A temperature / strain two-parameter fiber sensor based on long-period fiber Bragg grating (LPFG) cascaded fiber Bragg grating (FBG) is proposed. The femtosecond laser direct writing is used to fabricate LPFG contiguous FBG, with the FBG trough position of 1 551.9 nm,LPFG and the highest contrast of -12.7 dB at 1 559.1 nm,. The temperature characteristics of the sensor were measured in the range of 30 鈩,
本文編號:2416814
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