Chinese Optics Letters, 2018, 16 (4): 040606, Published Online: Jul. 12, 2018
Regenerated fiber Bragg grating for fiber laser sensing at high temperatures Download: 618次
Abstract
Thermally regenerated low-reflectivity fiber Bragg gratings (RFBGs), as one mirror of a resonant cavity, have been introduced as linear-cavity fiber lasers combining with fiber saturable absorbers. The output of lasing presents an optical signal-to-noise ratio of 50 dB and temperature sensitivity coefficient of 15.36 pm / ° C for the heating process and 15.46 pm / ° C for the cooling process. The lasing wavelength variation and power fluctuation at 700°C are less than 0.02 nm and 0.21 dB, respectively. The RFBG-based fiber laser sensing has displayed good linearity for both the temperature rising and cooling processes, and favorable stability at high temperatures.
Yumin Zhang, Dandan Rong, Lianqing Zhu, Mingli Dong, Fei Luo. Regenerated fiber Bragg grating for fiber laser sensing at high temperatures[J]. Chinese Optics Letters, 2018, 16(4): 040606.