Abstract: Disclosed herein is a laser module in which an optical block generating or controlling laser beams has a contact side surface made to have squareness, and neighboring optical blocks are coupled to each other in such a way that contact side surfaces thereof come into contact with each other, thus allowing the optical blocks to be aligned with each other and thereby obviating the necessity of additional alignment.

Abstract: A structurally improved rail-type device for mechanically splicing optical fibers while reducing the splicing loss is disclosed. The above splicing device not only has a cladding clamp with a seesaw structure thereby easily splicing the optical fibers, it also separately moves the covers relative to the body to easily perform the tuning operation. Due to coating clamp's protrusions and body's slots engaging with each other, the coating clamp exclusively vertically move relative to the body and prevent the optical fibers from being axially thrust. The splicing device further seperately clamps the coating and cladding parts of the optical fibers, thereby preventing the spliced fibers from breaking due to tensile or torsional force. The sliding motion of the covers relative to the body is achieved by the rails of the covers and rail grooves of the body.