Highly sensitive optical fiber temperature sensor based on resonance in sidewall of liquid-filled silica capillary tube<xref rid="cpb_28_11_114201fn1" ref-type="fn">*</xref><fn id="cpb_28_11_114201fn1"><label>*</label><p>Project supported by the Scientific Research Project of Institutions of Higher Learning in Inner Mongolia Autonomous Region, China (Grant No. NJZY19214).</p></fn>

Highly sensitive optical fiber temperature sensor based on resonance in sidewall of liquid-filled silica capillary tube**

Project supported by the Scientific Research Project of Institutions of Higher Learning in Inner Mongolia Autonomous Region, China (Grant No. NJZY19214).

Li Min^{1, †}, Feng Biao², Yin Jiwen¹

(a) Shift of the interference peak near 1450 with temperature increasing, and (b) linear fitting result of central wavelength values.