| 摘要 |
PROBLEM TO BE SOLVED: To reduce reflected light generated by optical fibers. SOLUTION: This optical fiber 10 is formed by splicing the end surface 23 of a first optical fiber 20 to the end surface 33 of a second optical fiber 30. Hereupon, the surface ends 23, 33 of the first optical fiber 20 and the second optical fiber 30 are formed so as to be α+θc>90 deg. when the end surface inclined angle to the direction Y orthogonal to the advancing direction X of light signals LS is defined as ' and the critical propagating angle of the optical fiber 10 is defined as θc. |
