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针对单模光纤的应用,我们研制了一种实用的激光二极管组件。该组件已在组合透镜法中得到应用。其作法是把两透镜共焦法中的第二透镜分成两个透镜,将其中之一紧贴到单模光纤的前端面,形成一根准光纤。该耦合法中准光纤和透镜两者的偏移容限都很大,因此易于焊接。这样,单模光纤激光二极管组件的制造就可能像多模光纤组件一样容易。组件的制造证实了这种方法耦合效率高、重复性好及稳定性高,而且,还发现因反射光引起的输出功率的波动也很小。
For single-mode fiber applications, we have developed a practical laser diode assembly. This component has been used in the combination lens method. The practice is to divide the second lens of the two-lens confocal method into two lenses, one of which is closely attached to the front face of the single-mode optical fiber to form a quasi-optical fiber. The misalignment of both the quasi-optical fiber and the lens in this coupling method is large and therefore easy to solder. In this way, the manufacture of single mode fiber laser diode assemblies can be as easy as multimode fiber assemblies. The fabrication of the module proved that this method has the advantages of high coupling efficiency, good repeatability and high stability. Moreover, the output power fluctuation caused by the reflected light is also found to be very small.