Bending loss measurement using a fiber cavity ringdown scheme |
| |
Authors: | Daniel E Vogler Ana Lorencak Julien M Rey Markus W Sigrist |
| |
Institution: | Laser Spectroscopy and Sensing Laboratory, Institute of Quantum Electronics, Swiss Federal Institute of Technology ETH, Hoenggerberg HPF D23, Zurich CH-8093, Switzerland |
| |
Abstract: | A novel sensitive technique for the determination of losses in fiber cavities is presented. The method is based on the cavity ringdown scheme implemented in silica-based single-mode fibers. Bending losses of fiber cavities of different lengths have been measured showing all an oscillating behavior with respect to the curvature radius of the fiber as predicted by a theoretical model. The best minimum detectable absorbance per cavity pass achieved by this new method is 1.72×10−3 dB within a 10 m-long cavity. This limit suffices well for an accurate determination of optical bending losses even in bend-insensitive fibers. Furthermore, the comparison of the measured bending losses with a theoretical model allows the extraction of different fiber parameters. Good agreement has been found between the experimentally derived parameters and literature data. |
| |
Keywords: | Cavity ringdown spectroscopy Silica-based single-mode fibers Fiber bending losses |
本文献已被 ScienceDirect 等数据库收录! |