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 optical fiber heat exchanger includes an outer body and an inner body inserted into the outer body. The inner body includes a plurality of guide walls to guide a cooling liquid through the optical fiber heat exchanger to exchange heat from an optical fiber inserted in the optical fiber heat exchanger, a first set of parallel straight channels, extending along an inlet portion of the inner body, formed by a first subset of the plurality of guide walls, a set of U-shaped channels, extending through a transition section of the inner body, formed by a second subset of the plurality of guide walls, and a second set of parallel straight channels, extending along an outlet portion of the inner body, formed by a third subset of the plurality of guide walls.

An optical transceiver includes a housing, a rib structure mounted on an inner surface of the housing, an optical communication module accommodated in the housing, and a heat conductive module. A gas flow passage is formed between each pair of adjacent ribs of the rib structure. The optical communication module includes a substrate and an optical communication component, and the optical communication component is in thermal contact with the housing. The heat conductive module is in thermal contact with the rib structure and the optical communication component.

An optical fiber heat exchanger includes an outer body and an inner body inserted into the outer body. The inner body includes a plurality of guide walls to guide a cooling liquid through the optical fiber heat exchanger to exchange heat from an optical fiber inserted in the optical fiber heat exchanger, a first set of parallel straight channels, extending along an inlet portion of the inner body, formed by a first subset of the plurality of guide walls, a set of U-shaped channels, extending through a transition section of the inner body, formed by a second subset of the plurality of guide walls, and a second set of parallel straight channels, extending along an outlet portion of the inner body, formed by a third subset of the plurality of guide walls.

An optical system including first and second optical elements for guiding light therein. For each optical element, the propagating light enters or exits the optical element through a coupling surface of the optical element. The coupling surfaces of the optical elements face, and align with, each other so that light propagating in one of the optical elements exits the optical element through the coupling surface of the optical element and enters the other optical element through the coupling surface of the other optical element. The coupling surfaces are separated from each other and define a region therebetween. The region is filled with a coolant, the coolant substantially surrounding at least one of the first and second optical elements.

An optical fiber heat exchanger includes an outer body and an inner body inserted into the outer body. The inner body includes a plurality of guide walls to guide a cooling liquid through the optical fiber heat exchanger to exchange heat from an optical fiber inserted in the optical fiber heat exchanger, a first set of parallel straight channels, extending along an inlet portion of the inner body, formed by a first subset of the plurality of guide walls, a set of U-shaped channels, extending through a transition section of the inner body, formed by a second subset of the plurality of guide walls, and a second set of parallel straight channels, extending along an outlet portion of the inner body, formed by a third subset of the plurality of guide walls.

The present disclosure relates to conductive cooling of a small form-factor pluggable (SFP) transceiver. For example, an SFP transceiver assembly may include a cooling block and a thermally conductive pad having a thermally conductive material. The SFP transceiver assembly may include a spring finger that contacts the thermally conductive pad while the SFP transceiver is inserted into the SFP transceiver assembly to allow heat to be conducted from the SFP transceiver to the cooling block via the thermally conductive pad to conductively cool the SFP transceiver.

A fiber termination assembly includes an optical fiber inserted into an optical ferrule disposed in an optical passageway of a heat conductive housing, the optical passageway providing an optical path aligned with the openings of the housing, the optical ferrule including a central bore concentrically disposed about the optical path and configured to receive a portion of a proximal end of the optical fiber therein, the optical ferrule and optical fiber secured in relation to the heat conductive housing with epoxy at a distal end of the optical ferrule, wherein the optical ferrule is transparent at a predetermined wavelength of light such that for light coupled into an input surface of the proximal end of the optical fiber at least a portion of the light propagating as cladding modes is stripped out of the optical fiber and transported to and dissipated in the heat conductive housing.

An optical module includes a board having a first surface and a second surface, an electronic device mounted on the first surface, a first cover that covers the first surface of the board, a second cover that covers the second surface of the board, a first heat dissipation member disposed between the board and the second cover, and a second heat dissipation member disposed between the first cover and the second cover.

The invention relates to a transparent auxiliary ring for the adjustment, for the long-term stable operation and for protection of fiber-coupled laser arrangements.