Numerical demonstration of mid-infrared temperature sensing by soliton self-frequency shift in a fluorotellurite microstructured fiber

• Published in: Applied physics. B, Lasers and optics Lasers and optics, 2021-12, Vol.127 (12), Article 156
• Main Authors: Cheng, Tonglei, Sun, Yue, Zhang, Fan, Yan, Xin, Zhang, Xuenan, Wang, Fang, Li, Shuguang, Suzuki, Takenobu, Ohishi, Yasutake
• Format: Article
• Language: English
• Subjects: Aluminum fluorides; Applied physics; Barium fluorides; Engineering; Fiber lasers; Frequency shift; Lasers; Magnesium fluorides; Optical Devices; Optics; Photonics; Physical Chemistry; Physics; Physics and Astronomy; Pulse duration; Quantum Optics; Silicon dioxide; Solitary waves; Strontium fluorides; Tellurium dioxide
• ISSN: 0946-2171; 1432-0649
• DOI: 10.1007/s00340-021-07695-6

We theoretically proposed the concept of temperature sensing using the soliton self-frequency shift (SSFS) effect in a fluorotellurite microstructured fiber (FTMF) which had one ring of six alcohol-infiltrated air holes. The glass material for the fiber core was 70TeO 2 –20BaF 2 –10Y 2 O 3 and the cladding AlF 3 –BaF 2 –CaF 2 –YF 3 –SrF 2 –MgF 2 –TeO 2 . Based on SSFS effect, temperature sensing in the mid-infrared (MIR) region was achieved by detecting the wavelength shift of solitons with the variation of temperature. Using a 2800 nm fiber laser with a pulse width of 131 fs as the pump light and a 0.5-m-long FTMF as the nonlinear media, the temperature sensing sensitivity could be as high as 2.09 nm/°C. To the best of our knowledge, this is the first study concerning temperature sensing in the MIR region by drawing on SSFS effect in a non-silica FTMF.