| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical fiber with a lens, with which high working precision is obtained as a result of superior workability and which has proper optical coupling efficiency to an elliptical mode light beam. SOLUTION: Slopes 31 symmetric with the core axis of the optical fiber are formed, and moreover slopes 32 each having an angle different from that of the slope 31 are provided to form a multistage wedge shape, and a desired curved surface 33 is provided at the tip end to form a lens 34. |
