| 摘要 |
A light coupling system includes a laser light source and an optical fiber. The optical fiber includes a fiber core having a central optical axis, and a cladding layer surrounding the fiber core. The optical fiber has a distal end surface covering a distal end of the fiber core and a distal end of the cladding layer. The distal end surface includes an inner conical surface centered on the central optical axis, and an outer frustoconical surface centered on the central optical axis and surrounding and adjoining the inner conical surface. A cone angle of the inner conical surface is greater than a cone angle of the outer frustoconical surface. The distal end surface of the optical fiber faces toward the laser light source.
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