Optical filter devices for providing a reflective event in an optical network are disclosed. In one embodiment, the optical filter device comprises an optical filter assembly for reflecting one or more preselected wavelengths and a housing. In one embodiment, the housing comprises a plug end and a receptacle end for optical connection into a link or connection node of an optical network. The housing comprises a passageway between the plug end and the receptacle end, and the plug end comprises a shroud with a single fiber connector footprint. At least a portion of the optical filter assembly is disposed within the passageway of the housing. The optical filter devices disclosed allow the network operator the flexibility to choose where to position a reflective location in the optical network along with the ability to move, add or change the reflective location as desired.

A managed fiber optic connector assembly formed with an optical fiber management enclosure. The optical fiber management enclosure is formed with a back body as one-piece to form an integrated fiber optic management enclosure, or fiber optic management enclosure is inserted into the back body form a two-piece enclosure. The fiber management enclosure has a plural of channels, for example, an upper channel and a lower channel that retain, separate and guide a plural of optical fibers that are accepted through a port at a distal end of the managed fiber optic connector assembly.

(Problem) To provide an optical ferrule that can easily accommodate multicore optical fibers, without an accompanying increase in the number of components. (Resolution Means) The optical ferrule 1 includes a guide opening 14 formed by an upper wall 10, a bottom wall 11, and a pair of side walls 12 and 13; a guide part 15 that extends forward from the upper wall 10 and the guide opening 14; and an optical coupler 20 provided on the upper surface of the upper wall 10. The optical coupler 20 has a waveguide aligning part 21 that aligns and holds an optical waveguide 2, and a light direction converter 22 that changes the direction of light from the optical waveguide 2 and emits the light toward an opposing optical ferrule 1.

A pluggable miniature optical passive device comprises a casing (30), an optical device (40) is mounted in the casing (30), a first end of the optical device (40) is provided with a first ceramic ferrule (43). At least one fiber core (432) is provided in the first ceramic ferrule (43), a first end (41) of the first ceramic ferrule (43) extends out of the casing (30). A second end (42) of the first ceramic ferrule (43) is positioned in the optical device (40), and the second end (42) of the first ceramic ferrule (43) is coated with an antireflection film, a lens (45) is provided close to the second end (42) of the first ceramic ferrule (43), the lens (45) is positioned in the optical device (40). At least one optical fiber is further provided in the optical device (40), a first end of the optical fiber is provided at a side close to the lens (45) and away from the first ceramic ferrule (43), a light beam incident in the optical fiber of the optical device (40) via the ceramic ferrule (43) and the lens (45). The pluggable miniature optical passive device has a small volume, and low manufacturing cost and long service life.

An optical ferrule includes a substrate formed of a diced wafer and a molded structure formed on the substrate. The molded structure may be formed of a curable material. The molded structure may include a plurality of grooves for positioning a plurality of optical fibers therealong, respectively, a plurality of reflective surfaces formed to reflect optical signals from ends of the plurality of optical fibers, respectively, or reflect incident optical signals towards the ends of the plurality of optical fibers, respectively, and an alignment structure disposed to be aligned to a corresponding alignment structure of a socket to which the optical ferrule is coupled.

Disclosed herein is wavelength-division multiplexing (WDM) and demultiplexing with signal entry and exit in a common routing surface to increase channel density. In particular, disclosed is a WDM assembly including one or more common ports and one or more channel sets, with each channel set including one or more channel ports. The WDM assembly includes a first routing surface with a first WDM passband and a second routing surface offset from the first routing surface. The second routing surface is configured to reflect at least one signal passed through the first routing surface back through the first routing surface at a laterally different location. The offset controls a pitch between reflected signals, while maintaining a sufficiently large surface area to ensure proper signal performance and/or structural integrity. Controlling pitch by offset provides higher density routing with smaller channel pitches and/or more channels in a decreased volume.

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.

Disclosed herein is wavelength-division multiplexing (WDM) and demultiplexing with signal entry and exit in a common routing surface to increase channel density. In particular, disclosed is a WDM assembly including one or more common ports and one or more channel sets, with each channel set including one or more channel ports. The WDM assembly includes a first routing surface with a first WDM passband and a second routing surface offset from the first routing surface. The second routing surface is configured to reflect at least one signal passed through the first routing surface back through the first routing surface at a laterally different location. The offset controls a pitch between reflected signals, while maintaining a sufficiently large surface area to ensure proper signal performance and/or structural integrity. Controlling pitch by offset provides higher density routing with smaller channel pitches and/or more channels in a decreased volume.

Optical terminators comprising a ferrule assembly with an optical filter for providing a reflective event in an optical network are disclosed. The optical filter assembly reflecting one or more preselected wavelengths so that the service provide can test optical links in an unmated connection node of the optical network. In one embodiment, the optical terminator has a hardened connector interface for outside plant applications. At least a portion of the optical filter assembly is disposed within the ferrule assembly of the optical terminator. The optical terminator advantageous allows the network operator to test and determine the operation of a branch of the optical network without having to send a technician to physically visit and test the operation of the desired link in the optical network.

A fiber module (1B) according to the present disclosure includes an input-side optical fiber (11), an output-side optical fiber (12), a ferrule (20) in which the input-side optical fiber and the output-side optical fiber are insertable in both ends and a groove (32) is formed in a direction orthogonal to a longitudinal direction (D1) in the middle of the longitudinal direction, a dielectric multilayer film filter (30) inserted in the groove, and an input-side GI fiber (15) and an output-side GI fiber (16) joined by fusion to respective terminal portions of the input-side optical fiber and the output-side optical fiber. The dielectric multilayer film filter is interposed between an end surface (15f) of the input-side GI fiber and an end surface (16f) of the output-side GI fiber in the longitudinal direction.