An optical ferrule configured to move along a mating direction to mate with a mating optical ferrule. The optical ferrule includes an attachment portion for receiving and securing one or more optical waveguides. First and second engagement portions are formed integrally with the optical ferrule and spaced apart from each other along the mating direction. First and second engagement portions are formed integrally with the mating optical ferrule and spaced apart from each other along the mating direction. When the optical ferrule mates with the mating optical ferrule, the first and second engagement portions of the optical ferrule engage the respective second and first engagement portions of the mating optical ferrule. The engagement of the engagement portions of the optical ferrules prevents each of the optical ferules from moving relative to the other optical ferrule along at least mutually orthogonal first and second directions orthogonal to the mating direction.

An optical ferrule comprises first and second compound stop features respectively disposed at opposing sides of the optical ferrule. Each compound stop feature has upper and lower contact surfaces. The lower contact surface is offset below the mating surface of the optical ferrule along a thickness axis perpendicular to the mating surface. The upper contact surface is offset above the mating surface along the thickness axis. The lower contact surface is offset forward from the upper stop surface along a mating direction of the optical ferrule. A connecting surface connects the upper contact surface and the lower contact surface.

A ferrule includes a ferrule matrix, an optical fiber, and a dielectric reflective film. The optical fiber is disposed in an accommodating through hole of the ferrule matrix, and the dielectric reflective film covers an optical transmission surface of the optical fiber and a surface that is of the ferrule matrix and that faces a matching ferrule. The dielectric reflective film has a through hole, such that the dielectric reflective film does not shield a main optical path area of the optical transmission surface of the optical fiber. A reflective band of the dielectric reflective film includes at least a part of a communication band of the optical fiber. In this way, when light from the matching ferrule is transmitted to the ferrule matrix and the optical fiber, the dielectric reflective film reflects the light.

Components and arrangements for managing wave division multiplexing (WDM) filters of fiber optic networks. A flexible a substrate is used to fix a fiber routing scheme that corresponds to a cascading arrangement of WDM filters. The WDM filters can be packaged as a standalone unit for easier handling and splicing of fiber pigtails to the pre-arranged fiber routing scheme.

A ferrule is provided, the fiber is inserted into a through hole axially disposed in the ferrule body, a first end of the fiber is located inside the through hole, a vertical distance between an end face of the first end of the fiber and a plane on which a connection end face of the ferrule body is located is a first preset distance, and the first preset distance is a distance that can leave a gap between a fiber of the ferrule and a fiber of another ferrule after the ferrule abuts the another ferrule.

An optical assembly includes a hermaphroditic cassette comprising a hood that includes a narrower section and a wider section. The narrower and wider sections are separated by slots such that the narrower section fits at least partially within a wider section of an identical mating hood of a mating optical assembly and the wider section receives a narrower section of the mating hood. The hood has first and second stop features configured to engage with second and first stop features of the mating hood. The first stop feature comprises a mating end of the narrower section of the hood and the second stop feature comprises a stop surface disposed within the wider section of the hood. Engagement of the stop features of the hood with stop features of the mating hood is configured to stop relative translational movement of the hood and the mating hood along the mating axis during mating.

A ferrule includes a ferrule matrix, an optical fiber, and a dielectric reflective film. The optical fiber is disposed in an accommodating through hole of the ferrule matrix, and the dielectric reflective film covers an optical transmission surface of the optical fiber and a surface that is of the ferrule matrix and that faces a matching ferrule. The dielectric reflective film has a through hole, such that the dielectric reflective film does not shield a main optical path area of the optical transmission surface of the optical fiber. A reflective band of the dielectric reflective film includes at least a part of a communication band of the optical fiber. In this way, when light from the matching ferrule is transmitted to the ferrule matrix and the optical fiber, the dielectric reflective film reflects the light.

An integrated connector-wavelength division multiplexing (WDM) device includes a housing defining a housing interior and a connector interface having at least one ferrule, a device input optical fiber extending from the housing to carry an input optical beam, a device output optical fiber extending from the housing to carry an output optical beam, and a plurality of channel filters positioned in the housing interior. A first channel filter is connected to the input optical fiber and a second channel filter is connected to the output optical fiber, wherein each of the plurality of channel filters is configured to separate at least one optical signal from a plurality of optical signals of the input optical beam and provide the at least one optical signal to the at least one ferrule. A fiber optic module or submodule having one or more integrated connector-WDM devices is also disclosed.

Optical fiber connections and their applications in downhole assemblies are described herein. The downhole assembly includes a well completion element with an end that couples with a corresponding well completion element. An optical fiber extends along at least a portion of the well completion element and transmits an optical signal using a first mode. The well completion element includes an optical fiber connector that is coupled to the optical fiber. The connector also includes a mode converter that receives the optical signal from the optical fiber and converts the optical signal from the first mode to a second larger mode. This second larger mode may be more robustly communicated to a corresponding optical fiber connector affixed to the corresponding well completion element.

A wet mate optical connector in combination with a wave division multiplexer, there being a plurality of input fiber optic cables on an input side of the multiplexer and a fiber optic cable on an output side of the multiplexer connected for providing multiplexed optical signals from the input cables to the wet mate connector.