Embodiment of present invention provide a wavelength division multiplexing (WDM) module. The WDM module includes a substrate having a first side and a second side opposing the first side, wherein the first side includes a transpassing region coated with an anti-reflective (AR) film and a reflective region coated with a high-reflective (HR) film, and the second side includes multiple ports of optical paths; multiple WDM filters attached to the multiple ports at the second side of the substrate, wherein surfaces of the WDM filters attached to the substrate are coated with WDM films; and at least one reflector attached to the second side of the substrate in a space between the multiple WDM filters, wherein the reflector has a first surface attached to the substrate and a second surface, opposing the first surface, that has a convex shape and coated with a high-reflective (HR) coating.

An optical demultiplexing device includes a demultiplexer configured to demultiplex an input light into lights of different wavelength bands, and output the lights of different wavelength bands in a first direction and a second direction, and a detector configured to detect the light output in the first direction and the light output in the second direction.

A wavelength multiplexer/demultiplexer includes a first collimator, M-number of second collimators, M-number of wavelength selective filters, and a base plate. Each of the wavelength selective filters includes a substrate having optical transparency and a multilayer film. The substrate includes a first main surface and a second main surface, and a bottom surface facing a placement surface of the base plate. The multilayer film is formed on the first main surface and transmits an optical signal in a specific transmission wavelength band and reflect an optical signal in a wavelength band other than the specific transmission wavelength band.

Each of the wavelength selective filters is fixed to the placement surface by a cured adhesive. The cured adhesive is in contact with the bottom surface and is in non-contact with the multilayer film in at least one wavelength selective filter among the wavelength selective filters.

A coarse wavelength division multiplexing (CWDM) device includes a supporting frame, a collimating lens, focusing lenses, a supporting block, and a light splitter. The supporting frame includes first frame portion with collimating lens and a second frame portion with focusing lenses arranged in an array along an extending direction of the second frame portion. The supporting block includes a first sidewall facing the first frame portion and a second sidewall facing the second frame portion. The light splitter includes a mirror on the first sidewall and a plurality of filters on the second sidewall, the filters being arranged in an array along an extending direction of the second sidewall. The filters correspond to the focusing lenses.

Example implementations relate to mounting optoelectronic devices and wavelength-division multiplexing optical connectors. For example, an implementation includes a transparent interposer having an integrated plurality of lenses. A plurality of optoelectronic devices are mounted to a bottom surface of the transparent interposer, each of the optoelectronic devices being paired to a respective lens of the plurality of lenses. The bottom surface of the transparent interposer is mounted to a substrate within a region of an optical socket. The optical socket receives a filter-based wavelength-division multiplexing (WDM) optical connector. Each lens of the plurality of lenses is paired to a respective filter of the WDM optical connector when the WDM optical connector is mated to the optical socket.

Method and multiport free-space wavelength division multiplexing (“WDM”) device capable of handling multiple optical signals carried in multiple wavelengths (“λ.sub.n”) using a relay lens are disclosed. The WDM device includes an optical filter, collimator, optical relay, and a relay optical filter. The optical filter is able to receive an optical beam containing multiple λ.sub.n and subsequently extract a first wavelength (“λ.sub.1”) from λ.sub.n. A second optical beam is formed by the remaining of λ.sub.n. The collimator, in one example, receives λ.sub.1 from the optical filter. Upon receiving the second optical beam, the optical relay collimates the second optical beam with minimal loss due to light divergence. The relay optical filter, in one aspect, is configured to receive the collimated second optical beam and redirects the collimated second optical beam to a predefined intended orientation.

An optical transmitter module that generates a signal multiplexing two or more optical signals each having optical power satisfying a preset magnitude is disclosed. The optical transmitter module includes laser diodes (LD), adjusting lenses coupled with the LDs to generate dispersive optical outputs, and a concentrating lens that concentrates the dispersive optical beams onto a coupling fiber. A feature of the optical transmitter module is that the adjusting lenses are set closer to the LDs to adjust the optical power coupled with the coupling 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.

The present invention provides a multi-channel integrated optical wavelength division multiplexing/demultiplexing assembly structure, comprising a light transmitting assembly and a light receiving assembly, the light transmitting assembly consisting of a laser chip array, a coupling lens set, a wavelength division multiplexing assembly, a single coupling lens and a single-core optical fiber, wherein the wavelength division multiplexing assembly comprises an optical waveguide chip, a band-pass filter set, a full-wavelength reflection unit, and multiple segments of waveguide optical paths that are continuously distributed in the optical waveguide chip in a Z-shape or W-shape, each of the multiple segments of waveguide optical paths has an input port and an output port which are distributed on left and right sides of the optical waveguide chip, respectively, the output ports comprise a tail end port which is arranged in correspondence to the single coupling lens, the band-pass filter set covers the input ports, and the full-wavelength reflection unit covers the output ports other than the tail end port. With the combination of the foregoing structure configurations, the technical problem of the presence of accuracy offset of the overall optical path is solved, and the effects of easy assembly, reduced cost and improved product yield are realized.

An apparatus includes a first and second VCSEL, each with an integrated lens. The VCSELs emit a first light beam having first optical modes at first wavelengths and a second light beam having second optical modes at second wavelengths. The apparatus also has an optical block with a first and second surface, a mirror coupled to the second surface, and a wavelength-selective filter coupled to the first surface. The first integrated lens mode matches the first beam to the optical block, and the second integrated lens mode matches the second beam to the optical block such that the first beam and second beam each have substantially a beam waist with a beam waist dimension at the first and second input region, respectively. An exit beam that includes light from the first beam and the second beam is output from the second surface of the optical block.