期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 21, 期 13, 页码 944-946出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2009.2020918
关键词
Optical fiber couplers; optical fiber measurement applications; optical interferometry
资金
- National Cooperative Highway Research Program [04-34]
A method for equalizing the path lengths of two arms of an optical fiber coupler is presented as a critical step towards construction of a high-resolution 3-D interferometric imaging system. Based on white-light interferometry (WLI), the technique combines absolute measurement capability with the ability to accurately measure near-zero path length differences. A controlled temperature increase in one arm of the coupler generates a shift in the WLI measurement, allowing the fibers to be polished to near-equal lengths. The technique is demonstrated to equalize the fiber lengths to better than 0.6 mu m.
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