Optic fibre end cap

The embodiment of the utility model provides an optic fibre end cap, optic fibre end cap includes that photonic crystal optic fibre, first no core fibre and second do not have the core fibre, the one end of first no core fibre with the photonic crystal fused fiber splice, the other end of first no core fibre with second centreless fused fiber splice, the cladding diameter of first no core fibre is more than or equal to the cladding diameter of photonic crystal optic fibre, the cladding diameter that the second does not have the core fibre is greater than the cladding diameter of first no core fibre. 本实用新型实施例提供了种光纤端帽，所述光纤端帽包括光子晶体光纤、第无芯光纤以及第二无芯光纤，所述第无芯光纤的端与所述光子晶体光纤熔接，所述第无芯光纤的另端与所述第二无芯光纤熔接，所述第无芯光纤的包层直径大于或等于所述光子晶体光纤的包层直径，所述第二无芯光纤的包层直径大于所述第无芯光纤的包层直径。