The invention provides a ferrule, a fiber connector and a manufacturing method of the ferrule. The ferrule comprises a ferrule body and at least one fiber; the fiber penetrates into a through whole arranged in axially in the ferrule body, the first end of the fiber is positioned in the through hole, and a vertical distance between the end surface of the first end of the fiber and a plane of a connection end surface of the ferrule core is a first preset distance, and a gap can be formed between the fiber of the ferrule and a fiber of a another fiber after butt joint of the ferrules via the first preset distance; the through hole comprises a first through hole segment, the plane where the top of the first through hole segment is positioned in the same with that where the connection end surface of the ferrule body is positioned, and an intersection of projection of the fiber in the axial direction and projection of a random cross section of the first through hole segment in the directionvertical to the axial direction equals projection of the fiber in the axial direction; and the outer wall of the fiber positioned in the first through hole segment is plated with an anti-reflection film. According to the ferrule, light transmission loss is low, and dust tolerance is high; and when the ferrule is plugged with the other ferrule, a plugging force is lower and the plugging reliabilityis higher.

Ferrule, fiber connector and manufacturing method of ferrule

The invention puts forward a laser optical fiber connector and a ferrule structure thereof. Heat accumulation can be greatly reduced, and the effectiveness of optical fiber coupling can be improved. The inlet of the ferrule of the laser optical fiber connector is shaped as a funnel, namely, the end face of the inlet of the ferrule is provided with a taper hole which is communicated with an inner axis channel. The portion of the axis channel near the taper hole is in tight fit with a laser optical fiber to be mounted and located. The inner surface of the taper hole better meets the conditions of diffuse reflection. Thus, laser speckles shine on the inner surface of the taper hole, reflection makes energy exponentially decline (it is better to produce perfect diffuse reflection to avoid light gathering), and heat accumulation is greatly reduced. Especially when a high-power laser optical fiber is installed, the front end face of the optical fiber is close to the big end face of the taper hole or is flush with the big end face of the taper hole, so that ablation of the end face of the optical fiber due to heat accumulation is avoided, and the effectiveness of optical fiber coupling is improved.

Laser optical fiber connector and ferrule structure thereof

A ferrule, an optical fiber connector, and a ferrule manufacturing method. The ferrule comprises a ferrule body (11) and at least one optical fiber (12). The optical fiber (12) passes through a through hole (111) axially provided inside the ferrule body (11), and a first end (120) of the optical fiber (12) is located inside the through hole (111). The vertical distance between a plane where an end surface (121) of the first end of the optical fiber (12) is located and a plane where a connection end surface (112) of the ferrule body (11) is located is a first preset distance (d1). The first preset distance (d1) is a distance that enables a gap to be formed between the optical fiber (12) of the ferrule and the optical fiber of another ferrule after the ferrule is connected to the another ferrule. The through hole (111) comprises a first through hole segment (113). A plane where the top portion (14) of the first through hole segment (113) is located is the plane where the connection end surface (112) of the ferrule body (11) is located. The intersection of the projection of the optical fiber (12) in an axial direction and the projection of any cross-section of the first through hole segment (113) in a direction perpendicular to the axial direction is the projection of the optical fiber (12) in the axial direction. The ferrule can reduce light transmission loss and provide good dust holding capacity; moreover, when the ferrule is inserted into or removed from another ferrule, the insertion force or the removal force is small, and the reliability of the insertion or removal is high.

Ferrule, optical fiber connector, and ferrule manufacturing method

The invention provides an optical fiber coupling heat dissipation structure and an optical fiber input head. The optical fiber coupling heat dissipation structure comprises an insertion core and an outer cover. The insertion core is tightly matched outside the bare fiber; the outer cover is tightly matched outside the insertion core; an accommodating space is reserved between the end surface of the insertion core and the end surface of the outer cover; the coupling surface of the bare fiber is positioned in the accommodating space so as to avoid contacting other parts and reduce energy radiation; the insertion core is made of a glass material so that part of deviated light can be transmitted out in time through the insertion core, the insertion core is prevented from absorbing heat to be heated up, the thermal expansion coefficient difference between the insertion core and the optical fiber can be eliminated, and structural deformation damage caused by stress change is avoided; the inclination angle of the end face of the insertion core is set, thereby preventing light which does not irradiate the bare fiber coupling surface from being reflected by the end face original path and interfering with the coupling lens.

Optical fiber coupling heat dissipation structure and optical fiber input head

The utility model provides a corresponding lock pin of laser fiber and cooperation mounting structure and fiber connector thereof can greatly alleviate the heat accumulation, improves the validity of fiber optic coupling. The lock pin entry of this laser fiber connector is the funnel pattern, and lock pin entry terminal surface sets up bell mouth and inside axle center passageway intercommunication promptly, the part that the axle center passageway is close to the bell mouth satisfies the tight fit with the laser fiber who treats the installation location. The interior side surface of bell mouth had better satisfy the diffuse reflection condition. Like this, side surface in the bell mouth is beaten to the laser speckle, makes the energy be the index through the reflex action and descends (had better produce complete diffuse reflection, avoid light to assemble), greatly lighten the heat accumulation. When especially installing high power laser optic fibre, the terminal surface is close to the big terminal surface parallel and level of the big terminal surface inclusive AND bell mouth of bell mouth before the optic fibre, has avoided hot accumulation to the ablation of fiber end face, improves the validity of fiber optic coupling.

Zhao Yanwu

Papers

Corresponding lock pin of laser fiber and cooperation mounting structure and fiber connector thereof