Embodiment of present invention provide an optical interconnect apparatus. The apparatus includes an optical signal path; a first set of fibers attached to a first end of the optical signal path via a first wavelength-division-multiplexing (WDM) filter; and a second set of fibers attached to a second end of the optical signal path via a second WDM filter, wherein at least the first set of fibers is a ribbon fiber. Embodiment of present invention further provide an interconnected optical system that includes a first optical transport terminal having a first set of optical signal ports and a second optical transport terminal having a second set of optical signal ports, with the two sets of optical signal ports being interconnected by the optical interconnect apparatus.

A transceiver with multi-wavelength coexistence is disclosed. A BOSA (bi-direction optical sub-assembly), a PCB (203) and a fiber receptacle (102) are disposed within a transceiver housing; the PCB (203) is horizontally arranged in the transceiver housing; the fiber receptacle (102) is disposed on the BOSA; the BOSA comprises multiple transmitters (0004) and multiple receivers (0003) all of which are optically coupled with the fiber receptacle (102) and electrically connected with the PCB (103); two or more BOSAs, which are stacked in parallel or perpendicular to the PCB (203), are disposed in the transceiver housing and respectively connected with an external fiber through multiple fiber receptacles (102).

Embodiments relate to the field of optical communications technologies. The bi-directional optical sub-assembly includes a transmitter optical path sub-assembly, a receiver optical sub-assembly, a wavelength division multiplexing sub-assembly, and an optical fiber interface. The transmitter optical path sub-assembly is configured to: generate emitted light and provide the emitted light for the wavelength division multiplexing sub-assembly; the wavelength division multiplexing sub-assembly is configured to: transparently transmit, to the optical fiber interface, the emitted light from the transmitter optical path sub-assembly, and reflect, to the receiver optical sub-assembly, received light from the optical fiber interface; the optical fiber interface is configured to: transmit, to the outside, the emitted light from the wavelength division multiplexing sub-assembly, and transmit, to the wavelength division multiplexing sub-assembly, received light received from the outside; and the receiver optical sub-assembly is configured to receive the received light reflected by the wavelength division multiplexing sub-assembly.

Embodiment of present invention provide an optical interconnect apparatus. The apparatus includes an optical signal path; a first set of fibers attached to a first end of the optical signal path via a first wavelength-division-multiplexing (WDM) filter; and a second set of fibers attached to a second end of the optical signal path via a second WDM filter, wherein at least the first set of fibers is a ribbon fiber. Embodiment of present invention further provide an interconnected optical system that includes a first optical transport terminal having a first set of optical signal ports and a second optical transport terminal having a second set of optical signal ports, with the two sets of optical signal ports being interconnected by the optical interconnect apparatus.

A hermetic optical subassembly includes an optical bench having a mirror directing optical signals to/from an optical waveguide, a carrier supporting a photonic device, and an intermediate optical bench having a mirror directing optical signals between the photonic device and the optical bench. The optical bench and the intermediate optical bench optically aligns the photonic device to the waveguide along a desired optical path. In one embodiment, the photonic device is an edge emitting laser (EML). The mirror of the optical bench may be passively aligned with the mirror of the intermediate optical bench. The assembled components are hermetically sealed. The body of the optical benches are preferably formed by stamping a malleable metal material to form precise geometries and surface features. In a further aspect, the hermetic optical subassembly integrates a multiplexer/demultiplexer, for directing optical signals between a single optical fiber and a plurality of photonic devices.

An optical branch module including a glass block, an input/output gradient index lens, an output gradient index lens, a beam splitter film, a mirror film, an input optical fiber, a first output optical fiber that extracts input light from the input optical fiber reflected by the beam splitter film as first output light, and a second output optical fiber that extracts light passed through the beam splitter film passed through the glass block, reflected by the mirror film, passed through the glass block again, and input from the other end of the output gradient index lens as second output light.

Embodiments of present invention provide an ultra-small-pitch optical filter assembly. The assembly includes a fiber collimator being able to receive an optical signal; a WDM filter module being able to de-multiplex the optical signal from the fiber collimator into multiple optical beams; and an optical lens assembly being able to receive the multiple optical beams from the WDM filter module and to reduce a physical spacing among the multiple optical beams from a first pitch D to a second pitch d, wherein D/d A method of fabricating the ultra-small-pitch optical filter assembly is also provided. A method of producing a set of optical beams with ultra-small-pitch of spacing is provided as well.

In one embodiment, a flow cytometer is disclosed having a compact light detection module. The compact light detection module includes an image array with a transparent block, a plurality of micro-mirrors in a row coupled to a first side of the transparent block, and a plurality of filters in a row coupled to a second side of the transparent block opposite the first side. Each of the plurality of filters reflects light to one of the plurality of micro-mirrors and passes light of a differing wavelength range and each of the plurality of micro-mirrors reflects light to one of the plurality of filters, such that incident light into the image array zigzags back and forth between consecutive filters of the plurality of filters and consecutive micro-mirrors of the plurality of micro-mirrors. A radius of curvature of each of the plurality of micro-mirrors images the fiber aperture onto the odd filters and collimates the light beam on the even filters.

Integrated WDM mux/demux devices are disclosed. Some embodiments are directed to an in-line WDM mux/demux device formed with a substrate and a common port at a first side of the substrate and a plurality of separated wavelength ports at a second side of the substrate. The first side of the substrate is free of separated wavelength ports. Other embodiments are directed to a WDM mux/demux device in which a linear variable filter is disposed in the substrate for separating the signals in different channels. In other embodiments, the filter or filters are sandwiched between the edges of adjacent substrates, such that light propagating along a waveguide in one of the substrates is transmitted through the filter to a waveguide in the second substrate. The adjacent substrates may be mounted to a base substrate.

An optical module for bi-directional monochromatic transmission is provided. The optical module includes a substrate, a common terminal, a circulator module, a multiplex-demultiplex (MDM) module, and an input-output terminal. The common terminal is adjacent to the substrate and connected to an optical fiber. The circulator module is on the substrate and in free space optical communication with the common terminal The MDM module is on the substrate and in free space optical communication with the circulator. The input-output terminal is on the substrate and in free space optical communication with the MDM module, the input-output terminal being configured to connect to an emitter and a receiver. The circulator is configured to spatially separate a first directional transmission to the MDM module from a second directional transmission from the MDM module.