High resolution temperature insensitive interrogation technique for FBG sensors

✍ Scribed by Qiang Wu; Yuliya Semenova; An Sun; Pengfei Wang; Gerald Farrell

• Book ID: 103875754
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 329 KB
• Volume: 42
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/j.optlastec.2009.11.005

✦ Synopsis

In this letter, we propose a high resolution temperature insensitive interrogation technique for FBG sensors where one FBG acts as an edge filter to interrogate a separate FBG sensor. A high resolution of better than 5 me in strain measurement range from 0 to 1100 me and the best resolution of better than 1 me were verified by experiments. An error of only 7 2.2 me is achieved over a temperature range from 15 to 50 1C, indicating that this strain interrogation technique is temperature insensitive. Using an altered system configuration, the temperature was also measured simultaneously with a resolution better than 0.2 1C.