A ferrule assembly and a fiber optic fast connector comprising the same are provided. The ferrule assembly comprises a tailstock provided with a window portion, in which a supporting platform is provided, and having an end provided with an opening. A ferrule is provided, with a receiving cavity for receiving an optical fiber. The ferrule has one end passing through the opening and then abutting against and connecting with the supporting platform to constitute a stepped portion and provided with a groove portion, and has another end located outside of the tailstock. A pressing block is provided, comprising abutting against and connecting with the groove portion, an end handle portion abutting against and connecting with the stepped portion, and a flexible portion connected with the pressing portion and the end handle portion, respectively. A lock catch slidably sleeved on the tailstock is provided.

When a second housing 80 and a first housing 30 are approached to each other along an axial direction, a body portion 62 of a second fixing member 60 begins to enter in an opening 81 of the second housing 80. Since a vertical wall surface 81a and a cylindrical surface 81b are formed on the opening 81 to substantially match the outer shape of the rear end of the body portion 62, when the second housing 80 is inserted to the first housing 30 while keeping the relative angle until the second housing 80 abuts on a first fixing member 40 which closes the opening and rotating the second housing 80 with respect to the first housing 30 by 90, a protrusion 64 faces and enters a recessed engagement portion 83 formed on the vertical wall surface 81a. Thus, the protrusion 64 and the recessed engagement portion 83 are fitted and fixed.

A plug connector has a cylindrical housing body having at least one step, which forms two different regions each having different housing diameters, wherein the region having the smaller diameter forms a plug-in region and the region having the larger diameter forms a socket region, wherein the plug connector has a lock, which is captively connected to the housing body, wherein the plug connector has an actuator, which is operatively connected to the lock, wherein the plug connector has a plugging positioner, which at least partially surrounds the plug-in region. An attachment flange fits the plug connector and has an insertion region designed as a hollow cylinder, wherein the inner region of the hollow cylinder has at least one step, which forms two different regions each having different inside diameters, wherein the inner region of the insertion region is unthreaded.

A fiber optic ferrule includes a body extending from a first end to a second opposite end, with the body including an axial passage extending between the first and the second ends. The axial passage includes a first diameter portion having a diameter of at least 125 microns, a second diameter portion having a diameter of at least 250 microns and less than a diameter of a buffer, and a smooth and continuous transition between the first and the second diameter portions. The second diameter portion is positioned between the first diameter portion and the second end. The axial passage further defines a tapered shape at the second end extending inward from the second end toward the second diameter portion. In certain embodiments, another smooth and continuous transition can be provided between the taper shape and the second diameter portion. In certain embodiments, the axial passage is smooth and continuous between the first and the second ends of the body. A hub holds the ferrule. A method of assembling a terminated fiber optic cable is also provided.

A behind-the-wall optical connector having an outer housing configured to be inserted into an adapter with a corresponding inner surface, and a latch attached to one side of housing configured to lock the connecter into an adapter opening. The latch is further configured with a locking channel and guide to accept a pull tab with a catch at one end, the pull tab releases the connector from the adapter opening when the tab is pulled rearward or away from the adapter. The ferrule assembly is inserted into a first end of the housing and when latched to the adapter, the assembly is retained in the housing without any locking structure therein.

A pull part for coupling to a connector includes a latch configured to be coupled to a housing of the connector and a tab configured to be coupled to the latch, wherein the latch has two support parts, a beam, and connecting portions, the beam connecting the two support parts, the connecting portions being situated between the support parts and the beam, and the two support parts configured to be attached to the housing, wherein the tab includes a body and a handle, the body having connection grooves formed at one side thereof and having the handle at an opposite side thereof, and wherein the connecting portions situated between the support parts and the beam are inserted into the connection grooves so as to couple the latch and the tab to each other.

An optical module includes a shell, a circuit board, a light-emitting chip, a lens assembly, an optical fiber ferrule assembly and a fastener. The fastener fixes the optical fiber ferrule assembly to the lens assembly. The fastener includes a fastening body, a first clamping portion and a second clamping portion. The first clamping portion is disposed at one end of the fastening body, and is clamped with the optical fiber ferrule assembly. The second clamping portion is disposed at the other end of the fastening body, and is clamped with the lens assembly.

A fiber optic adapter includes a shielding casing that is connected to a casing body and that defines a through channel. Two engagement members extend from a casing body and extend through the through channel. A pivot shaft engages the shielding casing. A shielding plate is connected to the pivot shaft. A restoring member is sleeved on the pivot shaft. The shielding plate is pivotable about the pivot shaft against a resilient force of the restoring member from a shielding position to an open position relative to the shielding casing. When the shielding plate is in the shielding position, the shielding plate is disposed between the engagement members and shields the through channel. When the shielding plate is in the open position, the shielding plate opens the through channel.

A modular optical connector includes a plurality of coupled optical ferrule support modules. Each optical ferrule support module comprises module connecting features configured to couple each ferrule support module with one or more neighboring ferrule support modules of the plurality of ferrule support modules. One or more optical ferrules are disposed and configured to rotate within the ferrule support module. Each optical ferrule includes a first attachment area configured to attach to one or more optical waveguides. One or more passageways are disposed within the ferrule support module. Each passageway is configured to receive the one or more optical waveguides. The passageway comprises a second attachment area configured to attach to the optical waveguides that are attached to the optical ferrule at the first attachment area. The passageway is dimensioned to constrain the optical waveguides to bend within the housing between the first attachment area and the second attachment area.

A fiber optic ferrule includes a body extending from a first end to a second opposite end, with the body including an axial passage extending between the first and the second ends. The axial passage includes a first diameter portion having a diameter of at least 125 microns, a second diameter portion having a diameter of at least 250 microns and less than a diameter of a buffer, and a smooth and continuous transition between the first and the second diameter portions. The second diameter portion is positioned between the first diameter portion and the second end. The axial passage further defines a tapered shape at the second end extending inward from the second end toward the second diameter portion. In certain embodiments, another smooth and continuous transition can be provided between the taper shape and the second diameter portion. In certain embodiments, the axial passage is smooth and continuous between the first and the second ends of the body. A hub holds the ferrule. A method of assembling a terminated fiber optic cable is also provided.