Xiaoli Zhao, Yumin Zhang, Runtao Yang, Fei Luo, Lianqing Zhu. High-Temperature Fiber Laser Sensing Based on Low-Reflectivity Regenerated Fiber Bragg Grating and Saturable Absorber[J]. Laser & Optoelectronics Progress, 2018, 55(6): 060605
- Laser & Optoelectronics Progress
- Vol. 55, Issue 6, 060605 (2018)
Fig. 1. Schematic of the experimental device
Fig. 2. Photo of experimental device
Fig. 3. Reflection and transmission spectra of seed grating used in the experiment
Fig. 4. Transmission spectrum of regenerated grating at 900 ℃
Fig. 5. Variation of central wavelength during the temperature rising and falling processes. (a) Cooling; (b) heating
Fig. 6. Average central wavelength versus temperature
Fig. 7. Change of output laser intensity with central wavelength. (a) Cooling process;(b) heating process
Fig. 8. Evolution of intensity with wavelength in temperature rising and falling processes under input current of 150 mA. (a) Cooling to 800 ℃; (b) cooling to 800 ℃; (c) heating to 300 ℃; (d) heating to 800 ℃
Fig. 9. Change of laser intensity and central wavelength tested for a long time under 700 ℃. (a) Variation of laser intensity and central wavelength; (b) output spectra of laser under different time
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