Example fiber optic connector systems have rugged, robust designs that are environmentally sealed and that are relatively easy to install and uninstall in the field. Some connector systems can be configured in the field to be compatible with different styles of fiber optic adapters. Some connectors include a first seal (90) on a release sleeve; and a second seal (88) between the release sleeve and a connector body. Other connectors include a seal (139) and a flexible latch (136) on a connector. Other connectors include a protective structure (228, 328, 428) that mounts over the fiber optic connector. Other connectors include a protective outer shell (528, 860) and a sealing and attachment insert (570, 570A, 876). Other connectors include a protective outer shell (728) and a fastener (780).

Fiber optic connectors having a sealing membrane such as a foil or the like disposed on the front end of the connector housing for inhibiting dirt, debris or dust from reaching a ferrule end face are disclosed. The fiber optic connectors may have one or more ferrules with a mating end face that is located rearward of a front end of a connector housing of the fiber optic connector. The sealing membrane is disposed on the front end about a perimeter of the connector housing for inhibiting contaminants from reaching the one or more mating end faces of the respective ferrules until the fiber optic connector is desired to be mated. The sealing membrane is quick and easy to remove and/or pierce, thereby allowing optical mating of the fiber optic connector while providing single-use contaminant protection beforehand.

An assembly having a protective part including a cap or a plug, a fiber optic component adapted to mate with the protective part and a lanyard. The lanyard has a first end attached to the protective part and a second end attached to the fiber optic component. One of the first and second ends of the lanyard includes a loop defined by a loop member. The loop has a plurality of undulations. The undulations are moveable between a first state and a second state. The undulations are at least partially straightened in a circumferential orientation as the undulations move from the first state to the second state. An inner cross-dimension of the loop is larger when the undulations are in the second state as compared to the first state, and wherein a resiliency of the loop biases the undulations toward the first state.

A ferrule-based fiber optic connectors having a connector assembly with a ferrule insertion stop for limiting the insertion of a ferrule into a ferrule sleeve are disclosed. In one embodiment, the fiber optic connector comprising a connector assembly, ferrule insertion stop, a connector sleeve assembly and a female coupling housing. The connector assembly comprises a ferrule and a resilient member for biasing the ferrule forward and the connector sleeve assembly comprises a housing and a ferrule sleeve, where the ferrule of the connector assembly is at least partially disposed in the ferrule sleeve when assembled. The ferrule insertion stop limits the depth that the ferrule may be inserted into the ferrule sleeve.

A fiber optic adapter includes a first side wall (110), a second side wall (112) opposite the first side wall, a top wall (114), and a bottom wall (116) opposite the top wall. A cavity (10) is defined by the top wall, the bottom wall, the first side wall, and the second side wall, and an optical fiber alignment device (20) is situated in the cavity. The top wall (114) has an opening (117) therein, and a cover (118) is configured to selectively close the opening.

Fiber optic connectors, cable assemblies and methods for making the same are disclosed. In one embodiment, the optical connector comprises a housing and a multifiber ferrule. The housing comprises a longitudinal passageway between a rear end and a front end, and a rear portion of the housing comprises a keying portion and at least one locking feature integrally formed in the rear portion of the housing.

Provided is a connector that includes an optical component and a movable member. The optical component emits light. Light from the optical component is incident upon the movable member and the movable member is movable between a first state taken during non-fitting to a counterpart connector and a second state taken during fitting to the counterpart connector. Incident light incident upon the movable member from the optical component is, in the first state, attenuated and emitted to an outside such that power of the light is lower than power of the light when the movable member is held in the second state.

An optical fiber sub-assembly includes: a handle, a rear retainer, an optical cable, a field mountable connector (FMC) assembly, a spindle, and a protection hood fixedly connected to the spindle. An end of the optical cable is connected to the FMC assembly, the optical cable protrudes from a first end of the FMC assembly. The FMC assembly includes a ferrule provided at a second end of the FMC assembly. The spindle is sleeved outside the first end of the FMC assembly, and the protection hood is sleeved outside the second end of the FMC assembly. An end of the spindle that is away from the protection hood is connected to the rear retainer and is used to fasten the optical cable. The handle is sleeved outside the protection hood and the spindle.

Disclosed is a composite-type outdoor connector, which includes a dustproof sleeve and a connecting sleeve, the dustproof sleeve includes a dustproof head sleeve and a connecting nut, the dustproof head sleeve and the connecting nut are screwed and fixed, and the connecting sleeve includes a connecting head sleeve and a connecting tail sleeve, a connecting component is provided in the middle of the connecting sleeve, the connecting component includes a protective sleeve, a connector, a fixing member, a stop ring and a ferrule, the beneficial effects of the present disclosure are that the optical fiber connection is more stable, the structure is more stable, and the cable is not easy to rotate and deviate, and different types of connectors can be connected by replacing different connecting head sleeves, thereby having better compatibility.

The present invention discloses a fiber optic connector comprising a housing, a spring, a ferrule assembly and a crimping seat. Before being inserted into the housing, the ferrule assembly is pre-assembled into the crimping seat in a manner of being movable relative to the crimping seat. The spring is pre-assembled into the housing before the ferrule assembly is inserted into the housing. After the pre-assembled ferrule assembly and crimping seat are inserted into the housing, the crimping seat is snap-fitted in the housing, and the spring pushes the ferrule assembly, so that the ferrule assembly is capable of being moved against the spring relative to the crimping seat. Before inserted into a housing of the fiber optic connector, some components may be pre-assembled together to form an integral assembly having a size less than that of a housing of the fiber optic connector. Accordingly, the integral assembly may be smoothly pulled through a small long pipe. After pulled through the pipe, the integral assembly may be easily and quickly inserted into the housing as a whole at one time.