Ms. Jianmei Sun Profile

Jianmei Sun

at Shanghai Univ

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Proceedings Article | 16 October 2019 Paper

Application of ultra-small gradient-index fiber probe in spectrum analyzer

Chi Wang, Yue Zhang, Jianmei Sun, Chenye Yang, Xinqun Luan, Yingjie Yu

Proceedings Volume 11205, 112050X (2019) https://doi.org/10.1117/12.2541905

KEYWORDS: GRIN lenses, Spectrum analysis, Graded index fibers

Read Abstract +

In order to improve the working performance of the optical fiber spectrum analyzer, a spectrum analyzer with an ultrasmall gradient-index (GRIN) fiber probe was studied. The theoretical model of this spectrum analyzer was established and a near-infrared spectrum analyzer with an ultra-small GRIN fiber probe was constructed. The performance of the analyzer was demonstrated using a narrow bandpass filter. The experimental results show that the spectrum analyzer with the GRIN fiber probe can obtain higher output power than that with the single-mode fiber probe at the same distance. In addition, the spectrum analyzer with the GRIN fiber probe still has good performance within the range twice the working distance of the GRIN fiber probe, which is near 1 mm. However, the system with the single-mode probe can only work within the range of 0.4 mm. The results demonstrate that the spectrum analyzer with the GRIN fiber probe has better working performance.

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