Abstract
• Stress oscillation amplitude reaches the maximum when the expanded angle is equal to 60°. • Stress oscillation amplitude is inversely proportional to the third power of the distance. • Optimized structure of an optical fiber with triple sector stress elements is acquired. The stress distribution characteristics of the optical fiber with triple sector stress elements are studied in detail. The relationship between the stress oscillation amplitude of the optical fiber and the structural parameters is analyzed. The structural parameters include the distance from the stress element center to the core center and the stress element area. The results show that the stress oscillation amplitude of the optical fiber with triple sector stress elements will increase rapidly if the stress element is close to the core while the stress element area is fixed. When the distance from the stress element center to the core center is fixed, the stress oscillation amplitude increases linearly with the increase of the stress element area under the premise of selecting the optimum stress element expanded angle. Based on the drawn conclusion, the optical fiber with triple sector stress elements is optimized. The maximum stress oscillation amplitude and the optical fiber structure with optimal stress distribution are determined to improve the coupling efficiency of the optical fiber and better realize the circular polarization state stable transmission.
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