Abstract: A variable optical attenuator is provided. The variable optical attenuator includes an input optical fiber, an output optical fiber, a non-attenuating, transmission-type diffracting prism and a prism positioning system. The input optical fiber, the non-attenuating, transmission-type diffracting prism and the output optical fiber are optically arranged such that an optical path from the input core of the input optical fiber to the output core of the output optical fiber passes through the non-attenuating, transmission-type diffracting prism. The non-attenuating, transmission-type diffracting prism diffracts an optical signal propagating from the input optical fiber to the output optical fiber such that an input portion of the optical path is non-linear with an output portion of the optical path. The prism positioning system changes a pose of the non-attenuating, transmission-type diffracting prism within the optical path thereby attenuating the optical signal.

Abstract: An optical fiber module rack system includes a rack including multiple accommodation chambers, opposing first and second sliding grooves located in each accommodation chamber, and a stop block located at each of opposing front and rear ends of each first sliding groove, and optical fiber storage boxes each including a box body mounted in one respective accommodation chamber, a first optical fiber module and second optical fiber module mounted in opposing front and rear sides of box body and connected together, two guide rails located at two opposite lateral sidewalls of box body and respectively coupled to first sliding groove and second sliding groove of respective accommodation chamber, two elastic retainer strips respectively extended from opposite ends of one guide rail and provided with a respective hook block for engagement with one respective stop block, and elongated press member extended from other guide rail for pressing by external force to disengage hook blocks from respective stop blocks for allo

Abstract: The present disclosure provides a stackable optical fiber adapter including shell members, a base with mating parts formed at front and rear sides thereof, and an accommodating cavity being transversely formed therein and communicated with the two opposite mating parts. One positioning part and wedged-jointing part are at two adjacent bases, and one clasping block and position-limiting groove are on the positioning part and the wedged-jointing part. By such a way, each two adjacent bases can be stacked, arranged or formed by a modularized manner, so that more shell members can be installed on a panel. The adapter can be easy to design the corresponding mold, the mating parts of each shell member is constant, and necessary to develop different molds, so the manufacturing process and the mold can be simplified, and the optical fiber adapter of the present disclosure can have stable structure and low cost, and further facilitate mass production.

Abstract: The present disclosure illustrates to a fiber module rack system in which a rack includes receiving spaces which each is formed by two frame plates of a base panel. Shell bodies of fiber optic cassettes are mounted in the receiving spaces, and a fiber module is disposed at a front part of the shell body, and a resilient locking member is disposed between the sliding track and at least one side of the shell body, so that the user can quickly and easily dismount the fiber optic cassettes from the rack without using tool.

Abstract: Various designs of optical switch are disclosed. In one embodiment, the optical switch uses wedges to hold up a collimator and secure the wedges and collimator to a substrate with a type of adhesive, thus avoiding high temperature in soldering process. There are at least two assemblies bonded to the substrate using the adhesive. Each of the assemblies includes a collimator and two wedges, where the wedges are provided to physically hold up the collimator in position. The assemblies are glued directly to the substrate after an optical alignment is performed.

Abstract: A bi-directional multiplexer/demultiplexer comprises a common port, an upgrade (UPG) port, a plurality of input/output ports, a plurality of wavelength division multiplexing (WDM) filters arranged in a zig-zag fashion, and a single bi-directional tap. The single bi-directional tap directs a tapped signal to a demultiplexing tap port in demultiplexing mode and a multiplexing tap port in multiplexing mode. The bi-directional tap may be a thin-film tap filter.

Abstract: An optical fiber module rack system includes a rack including multiple accommodation chambers, opposing first and second sliding grooves located in each accommodation chamber, and a stop block located at each of opposing front and rear ends of each first sliding groove, and optical fiber storage boxes each including a box body mounted in one respective accommodation chamber, a first optical fiber module and second optical fiber module mounted in opposing front and rear sides of box body and connected together, two guide rails located at two opposite lateral sidewalls of box body and respectively coupled to first sliding groove and second sliding groove of respective accommodation chamber, two elastic retainer strips respectively extended from opposite ends of one guide rail and provided with a respective hook block for engagement with one respective stop block, and elongated press member extended from other guide rail for pressing by external force to disengage hook blocks from respective stop blocks for allo

Abstract: A pluggable LC adaptor comprises a LC adaptor housing and an assembly, wherein the assembly is disposed in the LC adaptor housing. The assembly comprises: a first fiber collimator having a first lens; a first LC ferrule; a first fiber, where the first fiber is partially disposed inside the first LC ferrule and partially disposed inside the first fiber collimator; a second fiber collimator having a second lens; a second LC ferrule; a second fiber, where the second fiber is partially disposed inside the second LC ferrule and partially disposed inside the second fiber collimator; and an optical passive element disposed between the first collimator and the second collimator. The optical passive element may be a thin film filter or an isolator core.

Abstract: An apparatus for multiplexing and demultiplexing comprises: a substrate having a first surface and a second surface, where the second surface is opposite to the first surface; a first fiber array unit disposed on the first surface of the substrate and a second fiber array unit disposed on the second surface of the substrate, where a plurality of fibers in a fiber array unit are arranged in an array on a chip; a first microlens array disposed on the first surface of the substrate and a second microlens array disposed on the second surface of the substrate; a plurality of thin film filters disposed on the first and second surface of the substrate, where each thin film filter transmits light having a different wavelength band; a fiber collimator disposed on the first surface of the substrate; a turning prism disposed at an edge of the substrate for turning light from the first surface to the second surface of the substrate or also turning light from the second surface to the first surface of the substrate.

Abstract: Techniques for WDM Mux/DeMux on cable and methods of making the same are described According to one aspect of the present application, a unit designed to provide multiplexing or demultiplexing (Mux/Demux) functions is implemented on cable. In other words, the Mux/Demux unit is coupled by a multi-fiber cable to a system (e.g., a system rack for router or switch that has multiple pluggable transceiver slots).

Abstract: The present disclosure provides a tightly mountable optical fiber adapter which has a plurality of mating parts formed at front and rear sides of a base of a shell member thereof, and the base is combined with a base plate and two opposite side panels, each side panel is extended to form a first elastic part, and ends of second elastic parts are respectively outwardly bent and extended to form stop parts whose inner sides are bent towards the first elastic part and extended to form third elastic parts. While shell member is transversely mounted into an installing hole, first elastic parts are abutted and deformed to cross installing hole to clasp back side, second elastic parts are located in installing hole, so that shell member cooperating with mounting spring clip can be tightly fastened in installing hole, whereby the entire structure can be more securer.

Abstract: An apparatus including a passive wavelength division multiplexing (WDM) demultiplexer (DeMUX) or a passive WDM multiplexer (MUX), an active photo diode (PD) array or an active laser diode (LD) array, and a compressing device disposed between the passive WDM DeMUX or the passive WDM MUX and the active PD array or the active LD array. The compressing device changes the optical spot pitch of the passive WDM DeMUX or the passive WDM MUX o match the pitch of the active PD array or the active LD array. A compression ratio can be adjusted by changing the incident angle of the incident beam to the compressing device.

Abstract: An apparatus and method for splitting and controlling optical powers provided by an input fiber and received by a plurality of output fibers comprises: (a) providing a first collimated beam from the input fiber using a first lens; (b) splitting the first collimated beam into a plurality of separated collimated beams having different directions using a collimated beam splitting device; (c) controlling area of each separated collimated beam by moving the collimated beam splitting device on a plane perpendicular to the first collimated beam; and (d) focusing the plurality of separated collimated beams using a second lens and coupling the focused beams into the plurality of output fibers, respectively.

Abstract: An optical fiber module rack system includes a rack including multiple accommodation chambers, opposing first and second sliding grooves located in each accommodation chamber, and a stop block located at each of opposing front and rear ends of each first sliding groove, and optical fiber storage boxes each including a box body mounted in one respective accommodation chamber, a first optical fiber module and second optical fiber module mounted in opposing front and rear sides of box body and connected together, two guide rails located at two opposite lateral sidewalls of box body and respectively coupled to first sliding groove and second sliding groove of respective accommodation chamber, two elastic retainer strips respectively extended from opposite ends of one guide rail and provided with a respective hook block for engagement with one respective stop block, and elongated press member extended from other guide rail for pressing by external force to disengage hook blocks from respective stop blocks for allo

Abstract: An apparatus comprises a first array of angled ferrules and a second array of angled ferrules, a plurality of angled fibers, wherein first ends of the plurality of angled fibers are held in the first array of angled ferrules and second ends of the plurality of angled fibers are held in the second array of angled ferrules, a first array of non-angled ferrules and a second array of non-angled ferrules, a first plurality of non-angled fibers held in the first array of non-angled ferrules, a second plurality of non-angled fibers held in the second array of non-angled ferrules, wherein the first array of angled ferrules is aligned and connected with the first array of non-angled ferrules and the second array of angled ferrules is aligned and connected with the second array of non-angled ferrules.

Abstract: Techniques for WDM Mux/DeMux on cable and methods of making the same are described According to one aspect of the present invention, a unit designed to provide multiplexing or demultiplexing (Mux/Demux) functions is implemented on cable. In other words, the Mux/Demux unit is coupled by a multi-fiber cable to a system (e.g., a system rack for router or switch that has multiple pluggable transceiver slots).

Abstract: An apparatus comprises a passive wavelength division multiplexing (WDM) demultiplexer (DeMUX) or a passive WDM multiplexer (MUX), an active photo diode (PD) array or an active laser diode (LD) array, and a compressing device disposed between the passive WDM DeMUX or the passive WDM MUX and the active PD array or the active LD array. The compressing device changes the optical spot pitch of the passive WDM DeMUX or the passive WDM MUX to match the pitch of the active PD array or the active LD array. The compressing device may be a single optical wedge, a first and a second optical wedges, a plurality of optical wedges, or a grating. A compression ratio can be adjusted by changing the incident angle of the incident beam to the compressing device.

Abstract: The present disclosure provides a tightly mountable optical fiber adapter which has a plurality of mating parts formed at front and rear sides of a base of a shell member thereof, and the base is combined with a base plate and two opposite side panels , each side panel is extended to form a first elastic part, and ends of second elastic parts are respectively outwardly bent and extended to form stop parts whose inner sides are bent towards the first elastic part and extended to form third elastic parts. While shell member is transversely mounted into an installing hole, first elastic parts are abutted and deformed to cross installing hole to clasp back side, second elastic parts are located in installing hole, so that shell member cooperating with mounting spring clip can be tightly fastened in installing hole, whereby the entire structure can be more securer.

Abstract: Techniques for designing compact free-space optical device with all input/output ports on one side are disclosed. Instead of folding a fiber, a beam folding means is provided to turn a light beam to significantly reduce the size of the device. In one embodiment, there are a first collimator, a second collimator, and a beam folding means to turn a light beam from the first collimator back to the second collimator by two turns so that a first light path from the first collimator to the beam folding means and a second light path from the second collimator to the beam folding means are parallel. A substrate is provided to which the first and second collimators and filters are boned thereto.

Abstract: The present disclosure provides a tightly mountable optical fiber adapter which has a plurality of mating parts formed at front and rear sides of a base of a shell member thereof, and the base is combined with a base plate and two opposite side panels , each side panel is extended to form a first elastic part, and ends of second elastic parts are respectively outwardly bent and extended to form stop parts whose inner sides are bent towards the first elastic part and extended to form third elastic parts. While shell member is transversely mounted into an installing hole, first elastic parts are abutted and deformed to cross installing hole to clasp back side, second elastic parts are located in installing hole, so that shell member cooperating with mounting spring clip can be tightly fastened in installing hole, whereby the entire structure can be more securer.