The invention discloses a polarization-maintaining
photonic crystal fiber and panda
fiber welding method. The polarization-maintaining
photonic crystal fiber and panda fiber
welding method is characterized by comprising a step 1 of selecting an initial position of a fiber, a step 2 of aligning a polarization shaft, and a step 3 of
welding. The polarization-maintaining
photonic crystal fiber and panda fiber welding method realizes better matching of two fiber mode fields and lowering welding consumption by controlling collapse of an air hole of a
photonic crystal fiber and a
diameter at the welding point of the panda fiber. The polarization-maintaining
photonic crystal fiber and panda fiber welding method lowers welding consumption and improves welding intensity by adding a propelling distance in a fiber
welding process appropriately. By adopting a novel welding
machine and an end face imaging and
shaft alignment technology, the polarization-maintaining
photonic crystal fiber and panda fiber welding method can realize alignment of the polarization shafts of both the photonic
crystal fiber and the panda fiber and improve
shaft alignment precision. The polarization-maintaining photonic
crystal fiber and panda fiber welding method, disclosed by the invention, has the advantages of being simple in technology, only needing once welding, and being easy to operate, good in
repeatability and applicable for welding between photonic
crystal fibers of the other types and traditional single-mode fibers.