| 摘要 |
PURPOSE:To reduce modal noises and distortion by providing a mirror block between a laser diode and an output optical fiber. CONSTITUTION:Light from an LD1 is incident on input-side semitransparent mirrors 21-2n of the mirror block 4 and reflected totally by total reflecting mirrors 31 and 32 while repeating partial reflection and transmission by the mirrors 21-2n, thereby reaching a lens 5. When said mirrors 31, 32 and 21- 2n are all parallel to one another, light projected from the output side of the block 4 is parallel and, therefore, converged to one point by a lens 5 to couple with an optical fiber 6, where the light is transmitted. The light beams A1-An incident to the lens 5 differ in absolute delay and form a piece of flux, and even when the emitted light of the LD1 has good coherence, the light which is incident to the optical fiber 6 through the lens 5 and transmitted therein has no coherence. |
