Abstract

We have experimentally demonstrated an active loading sensor system based on a fiber ring laser with single-polarization output using an intra-cavity 45°-tilted fiber grating. When the laser cavity fiber is subjected to loading, the laser output is encoded with the loading information that can be measured and monitored by a standard power meter. The achieved loading sensitivity is $0.033/(\mathrm{kg}·{\mathrm{m}}^{-1})$ and $0.042/(\mathrm{kg}·{\mathrm{m}}^{-1})$ for two different interaction lengths. The experimental results clearly show that such a single-polarization fiber laser may be commercially developed into a low-cost, high-sensitivity loading sensor system.

© 2015 Optical Society of America

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