An optical receiver includes: an optical stub which includes an optical fiber; an optical demultiplexer; a plurality of photo detectors; a TIA; an optical block including a first concavity, a second concavity, a first reflective plane, a second reflective plane, and a third reflective plane, the first concavity being configured to hold the optical stub, the second concavity being configured to accommodate the optical demultiplexer, the first reflective plane and the second reflective plane being configured to sequentially reflect a multiplex optical signal so that the multiplex optical signal emitted from an end surface of the optical stub is folded back toward the optical stub and is sequentially incident to the optical demultiplexer, and the third reflective plane being configured to reflect the plurality of single-wavelength optical signals emitted from the optical demultiplexer toward the plurality of photo detectors; and a circuit board.

An optical device is provided. The optical device includes a fiber array and an optical assembly. The fiber array includes a common channel and a plurality of divided channels arranged in parallel in a first direction and extending along a second direction, and the fiber array has a first surface from a top view perspective. The optical assembly is coupled to the first surface of the fiber array. The first surface and the common channel of the fiber array form an angle less than 90 degrees from the top view perspective.

Provided is a multi-channel light-receiving module, which comprises an incident collimator, a light-splitting assembly, an optical path conversion assembly and a photoelectric chip array which are arranged in sequence, wherein the light-splitting assembly comprises an inner reflector and a plurality of optical filters, and the optical filters are respectively arranged on an output end of the inner reflector; the channel interval of photoelectric chips in the photoelectric chip array is less than the channel interval of an adjacent optical filter; the optical path conversion assembly comprises a plurality of emergent collimators and an optical fiber connected to each of the emergent collimators; a plurality of paths of optical signals output by the light-splitting assembly are respectively coupled into corresponding optical fibers after passing through the plurality of emergent collimators; and the plurality of paths of optical signals are output by output ends of the plurality of optical fibers and are then coupled to the photoelectric chip array. By means of the light-receiving module, an optical path component is converted into a small channel interval of photoelectric chips from a large channel interval of optical filters, the problem of it being difficult to match the channel interval of optical filters and the channel interval of photoelectric chips is solved, the cost of photoelectric chips is reduced, and the assembly difficulty of optical filters is also reduced.

Aspects described herein include an optical apparatus comprising a plurality of light-carrying media, a wavelength division multiplexing (WDM) device optically coupled with the plurality of light-carrying media, and a lens arranged between the WDM device and a multicore optical fiber. An arrangement of the plurality of light carrying media and the WDM device are selected to align each of the plurality of light-carrying media with a respective optical core of the multicore optical fiber.

A wavelength division multiplexing device includes an alignment substrate configured to provide alignment between optical components of the device. The device includes a plurality of collimating lenses, and the alignment substrate includes a plurality of aligners. Each of the aligners is configured to place a respective one of collimating lenses in a predetermined position and a predetermined orientation with respect to the other collimating lenses. The alignment substrate thereby provides passive alignment of the collimating lenses with a designed optical path. The substrate may also include visual alignment markings that provide an indication of the placement of multi-layer thin film filters so that the filters define an actual optical path in alignment with the designed optical path, and integrated optical waveguides that provide an optical beam to each of the collimating lenses.

A butterfly-type packaged optical transceiver with multiple transmission and reception channels includes a box-shaped housing, a cover plate, an optical receiving module, an optical emitting module, a polarizing prism module, an optical fiber connector and electrical connection elements. The sealed housing encloses the optical receiving module, the optical emitting module, and the polarizing prism module. Electrical connection elements penetrate both side surfaces of the housing and are in contact with the optical fiber connector and the optical receiving module and the optical emitting module. A first incoming optical signal is transmitted to the optical receiving module via the optical fiber connector, the through hole, and the prism module, and the optical emitting module emits an outgoing second optical signal through the prism module, the through hole, and the optical fiber connector.

A foamed, opacifying element useful as a light-blocking article is prepared with a dry opacifying layer on a substrate. The dry opacifying layer is densified, followed by application of a functional composition formulation to form a functional composition upon drying and curing at a coverage of 0.5-15 g/m.sup.2. The functional composition comprises at least: (i) glass particles such as hollow glass particles at a coverage of 0.1-2.2 g/cm.sup.2, and can also include any or combination of a (iv) water-soluble or water-dispersible organic polymeric binder that may be crosslinked, thickeners, coating aids having an HLB of at least 5, (ii) lubricants, (iii) tinting materials, and (v) crosslinking agents. Among other properties, the presence of the glass particles provides additional heat absorption for the foamed, opacifying elements that can be formed into light-blocking materials.

Provided is a multi-channel light-receiving module, which comprises an incident collimator, a light-splitting assembly, an optical path conversion assembly and a photoelectric chip array which are arranged in sequence, wherein the light-splitting assembly comprises an inner reflector and a plurality of optical filters, and the optical filters are respectively arranged on an output end of the inner reflector; the channel interval of photoelectric chips in the photoelectric chip array is less than the channel interval of an adjacent optical filter; the optical path conversion assembly comprises a plurality of emergent collimators and an optical fiber connected to each of the emergent collimators; a plurality of paths of optical signals output by the light-splitting assembly are respectively coupled into corresponding optical fibers after passing through the plurality of emergent collimators; and the plurality of paths of optical signals are output by output ends of the plurality of optical fibers and are then coupled to the photoelectric chip array. By means of the light-receiving module, an optical path component is converted into a small channel interval of photoelectric chips from a large channel interval of optical filters, the problem of it being difficult to match the channel interval of optical filters and the channel interval of photoelectric chips is solved, the cost of photoelectric chips is reduced, and the assembly difficulty of optical filters is also reduced.

Aspects described herein include an optical apparatus comprising a plurality of light-carrying media, a wavelength division multiplexing (WDM) device optically coupled with the plurality of light-carrying media, and a lens arranged between the WDM device and a multicore optical fiber. An arrangement of the plurality of light carrying media and the WDM device are selected to align each of the plurality of light-carrying media with a respective optical core of the multicore optical fiber.

Pluggable optical transceiver modules are described herein that are specifically configured to preclude use of fiber jumpers inside of the module. Pluggable optical transceiver modules implement a rigid-plane jumper that provides an opto-mechanical interface between an external fiber cable (attached to the pluggable optical transceiver module) and the optical transceiver in a manner that does not require the fiber jumper, while ensuring reduced optical loss. In some embodiments one or more rigid waveguide plates act as an opto-mechanical coupling between the external fiber cable and on-board opto-electrical components (e.g., optical transceiver). For example, the rigid waveguide plates are coupled to a faceplate connector, and a CWDM block that is in turn optically coupled to the optical socket. In some embodiments, the CWDM block is directly attached to the rigid waveguide plates. In some embodiments, the CWDM block is indirectly attached to the rigid waveguide plates using a half periscope.