The impact of fiber fusion on the focal ratio degradation and transmission

Jian Li; Guanru Lyu; Shuqing Wang; Yonghui Hou

doi:10.1117/12.2525141

9 September 2019 The impact of fiber fusion on the focal ratio degradation and transmission

Jian Li, Guanru Lyu, Shuqing Wang, Yonghui Hou

Proceedings Volume 11115, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX; 1111516 (2019) https://doi.org/10.1117/12.2525141
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

We report results of the impact of fiber fusion splicing on Focal Ratio Degradation and transmission loss. Experiment use formed beam methods at wavelengths between 400 and 1000nm of Polymicro fiber. We test at five input f-ratio (f/2.5, f/3.75, f/5, f/75, f/10) conditions, the influence of fiber fusion splicing on FRD respectively, and test at f/5 input fratio condition, the influence of fiber fusion splicing on fiber transmission loss. A precision test system was designed to reduce the system error and human error. The measurement accuracy of the system reaches micron scale. The fiber end surface was prepared by large core fiber cutter, grinder and fusion splicing workstation. The fiber surface roughness is less than 1 micron and the surface angle is less than 0.5 deg. By optimize the cutting and polish process, adjusted the fusion parameters, a satisfactory results of optical fiber fusion obtained in the laboratory. The maximum transmission increase caused by the fiber fusion is less than 2%, average value is less than 1%; while the maximum FRD increase is less than 0.16 degrees. Our results indicate that fiber fusion technology can be adopted for repair failure optical fiber, replace the fiber clips and astronomical instrument construction.

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Jian Li, Guanru Lyu, Shuqing Wang, and Yonghui Hou "The impact of fiber fusion on the focal ratio degradation and transmission", Proc. SPIE 11115, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX, 1111516 (9 September 2019); https://doi.org/10.1117/12.2525141

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KEYWORDS

Fusion splicing

Optical fibers

Polishing

Telescopes

Spectrometers

Astronomy

Light sources

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