Internal fields in fused couplers have been investigated for the first time by measuring the near field and far field patterns at different cross sections of the couplers. Detailed information concerning the internal fields in the couplers provides experimental evidence for the validity of the hybrid mode theory of fused couplers.
© 1989 Optical Society of America
Jian-Luo Zhang, Zhong-Ming Mao, and Zong-Qi Lin, "Measurements and analyses of fields in fused tapered single-mode fiber couplers," Appl. Opt. 28, 2026-2030 (1989)