Reduced thermal sensitivity of hybrid air-core photonic band-gap fiber ring resonator

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2018,（1）
• 页码范围: 17-20
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s11801-018-7217-8

摘要

A novel hybrid air-core photonic band-gap fiber (PBF) ring resonator with twin 90° polarization-axis rotated splices is proposed and demonstrated.Frist,we measure the temperature dependent birefringence coefficient of air-core PBF and Panda fiber.Experimental results show that the relative temperature dependent birefi-ingence coefficient of air-core PBF is 1.42× 10-8/℃,which is typically ～16 times less than that of Panda fiber.Then,we extract the geometry profile of air-core PBF from scanning electron microscope (SEM) images.Numerical modal is built to distinguish the fast axis and slow axis in the fiber.By precisely setting the length difference in air-core PBF and Panda fiber between two 90° polarization-axis rotated splicing points,the hybrid air-core PBF ring resonator is constructed,and the finesse of the resonator is 8.4.Environmental birefringence variation induced by temperature change can be well compensated,and experimental results show an 18-fold reduction in thermal sensitivity,compared with resonator with twin 0° polarization-axis rotated splices.