| 摘要 |
Disclosed is a laser beam combination method capable of real time alignment. The laser beam combination method comprises: a step in which a reflection mirror reflects a plurality of laser lights oscillated from an optical fiber laser device formed after a plurality of single optical fibers is combined; a step in which a diffraction grid element diffracts the laser lights reflected from the reflection mirror to a zero order diffraction laser light and a primary diffraction laser light in different directions; a step in which an image formation lens refracts the zero order diffraction laser diffracted from the diffraction grid element; a step of imaging the zero order diffraction laser refracted from the image formation lens in an image sensor; a step in which a system controller analyzes the position of the zero order diffraction laser imaged in the image sensor; and a step in which the system controller changes the wavelength of the optical fiber laser device depending on an analyzing result and aligns the wavelength in real time. According to the laser beam combination method capable of real time alignment as stated above, a laser light of each single optical fiber is sensed and then, the wavelength of the optical fiber laser device is changed and optical fiber can be aligned if mechanical alignment of the single optical fibers is twisted by external environment and external condition. Therefore, the quality and output of the laser light can be consistently maintained by aligning the optical fiber without the mechanical alignment and position change of the single optical fiber in real time. Moreover, time and effort required for the realignment of existing single optical fiber can be reduced and maintenance can be easily executed. |
