Abstract
With the continuous development of photoelectron technology, based on the traditional passive FBG (FBG) sensor, a new generation of sensor with distributed feedback (DFB) fiber laser as sensing element has emerged and becomes a hot topic in the field of optical fiber sensing. Fiber laser has the advantages of common FBG sensor like simple structure, strong anti-electromagnetic interference, small size, and easy to set up sensor network by WDM multiplexing. It also has the unique advantages of single frequency, narrow line width, high power, and ultra-low noise.
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