基于超宽带铋铒共掺光纤光源的光纤光栅传感

Fiber Bragg Grating Sensing by Ultra-Broadband Light Source Based on Bismuth-Erbium Co-Doped Fiber

为开发低成本且性能稳定的超宽带光源,研究了基于铋铒共掺光纤(BEDF)的超宽带光源的输出光谱特性。当使用830nm激光器抽运时,输出光谱覆盖了整个O、E、S、C、L波段,半峰全宽达525nm。将该BEDF超宽带光源应用于波分复用光纤光栅传感系统,实现了O波段和C波段的应力传感。实验结果表明,将BEDF超宽带光源应用于大规模光纤光栅传感网络,可大幅度提高传感系统的复用容量。

In order to develop both cheap and stable ultra-broadband light sources, the output spectral characteristics of ultra-broadband light source based on Bismuth-Erbium co-doped fiber （BEDF） are investigated. With the 830 nm lasers as pump, the output spectrum covers the whole O-, E-, S-, C-, L-bands and the full width at half maximum （FWHM） reaches 525 nm. With the application of BEDF ultra-broadband light source in wavelength division multiplexing fiber Bragg grating （FBG） sensing system, the strain sensing at O band and C band is realized. Experimental results indicate that the application of BEDF ultra-broadband light sources to large-scale FBG network can greatly increase the multiplexing capacity of the sensing system.