Polarization and magneto-optical characteristics of Tb:YAG crystal-derived silica fiber via laser-heating drawing technique
Fiber quarter-wave plates and magneto-optical fibers are important components that greatly affect the sensitivity of fiber-optic current sensors. A Tb:YAG crystal-derived silica fiber (TYDSF) was fabricated using a laser-heating drawing technique. The linear birefringence of TYDSF was measured as by a microscope birefringence measurement instrument. A fiber quarter-wave plate was fabricated by TYDSF at 1310 nm, which produced circularly polarized light with a polarization extinction ratio of 0.34 dB. Additionally, the linear birefringence of TYDSF was decreased by 22% by annealing at 750°C for 7 h, and the Verdet constants of annealed TYDSF were measured to be 9.83, 6.67, and at 808, 980, and 1310 nm, respectively.
Hao Shi, Jianxiang Wen, Beibei Xing, Yanhua Luo, Xiaobei Zhang, Fufei Pang, Tingyun Wang. Polarization and magneto-optical characteristics of Tb:YAG crystal-derived silica fiber via laser-heating drawing technique[J]. Chinese Optics Letters, 2023, 21(11): 110601.