Pu Sean, Gu Xijia
Department of Electrical and Computer Engineering, Ryerson University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada.
Opt Lett. 2009 Jun 15;34(12):1774-6. doi: 10.1364/ol.34.001774.
We have successfully demonstrated cavity ring-down spectroscopy in a fiber ring with a long-period grating cavity. The cavity couples >99% of light from core to cladding, interacts with the environment surrounding the fiber, and then couples unabsorbed light back into the fiber core. This design provides a relatively large evanescent wave absorption area while maintaining a very low loss for the fiber ring. The effectiveness of this cavity as a sensitive chemical sensor is also demonstrated.
我们已成功在具有长周期光栅腔的光纤环中演示了腔衰荡光谱技术。该腔将超过99%的纤芯光耦合到包层，与光纤周围的环境相互作用，然后将未被吸收的光再耦合回光纤纤芯。这种设计在保持光纤环极低损耗的同时，提供了相对较大的倏逝波吸收面积。还展示了这种腔作为灵敏化学传感器的有效性。
