Patent ID: 7461980

Claim:
A transmitter optical sub-assembly receptacle comprising: a base structure including a longitudinal hole; a fiber ferrule positioned within said longitudinal hole of said base structure; a cylindrical shell structure partly positioned within said longitudinal hole of said base structure; and a split sleeve positioned within said cylindrical shell structure and partly within said longitudinal hole of said base structure such that a part of said fiber ferrule is positioned within said split sleeve, said split sleeve having a thickness larger than 0.187 millimeter, wherein said longitudinal hole of said base structure includes a first circular hole section at a first end of said base structure and a second circular hole section at a second end of said base structure, said first end being engaged with said cylindrical shell structure, the diameter of said first circular hole section being larger than the diameter of said second circular hole section, and wherein said longitudinal hole of said base structure includes an intermediate hole section connecting said first circular hole section and said second circular hole section, the diameter of said intermediate hole section being smaller than said diameter of said first circular hole section and larger than said diameter of said second circular hole section, said diameter of said intermediate hole section being uniformed.