Disclosed is a method and system for passively aligning optical fibers (4), a first waveguide array (62), and a second waveguide array (42) using chip-to-chip vertical evanescent optical waveguides (44) and (64), that can be used with fully automated die bonding equipment. The assembled system (2, 30, 60) can achieve high optical coupling and high process throughput for needs of high volume manufacturing of photonics, silicon photonics, and other applications that would benefit from aligning optical fibers to lasers efficiently.

Optical coupling systems are provided. An optical coupling system includes a first optical fiber end (122a) having a first core (124a), a second optical fiber end (122b) having a second core (124b), and a laser diode (110) optically coupled to the first core and the second core at an optical coupling location. The laser diode emits a light beam having an asymmetrical cross-sectional light beam profile comprising a fast axis diameter and a slow axis diameter. The fast axis diameter is longer than the slow axis diameter. Further, the first optical fiber end and the second optical fiber end are adjacently positioned along the fast axis diameter of the asymmetrical cross-sectional light beam profile of the laser diode at the optical coupling location such that the first core and the second core are within the asymmetrical cross-sectional light beam profile at the optical coupling location.

An optical fiber bundle structure includes: plural optical fiber core wires; a crossing preventing member; and a grasping member. Further, the crossing preventing member has slits and the widths of the slits positioned at the respective sides are each equal to or larger than a difference between: a length of one side of a polygon circumscribing the plural optical fiber core wires at a hindmost end portion of the slits at the trailing end; and a length of one side of a polygon circumscribing the plural optical fiber core wires at the leading end.

An optical connector assembly includes a first optical connector and a second optical connector. The first optical connector includes a first housing, a plurality of first optical fibers, a first cable retainer and a first light coupling unit attached to the plurality of first optical fibers and separated by a first optical fiber length L1. The second optical connector includes a second housing, a plurality of second optical fibers, a second cable retainer and a second light coupling unit attached to the plurality of second optical fibers and separated by a second optical fiber length L2, different from L1. The ratio of L1/L2 is such that, when the first optical connector is mated with the second optical connector, the first light coupling unit and the second light coupling unit rotate relative to the first housing and the second housing, respectively, and mate.

There is provided an optical connection structure in which an optical fiber and an optical semiconductor waveguide are easily connected with low loss. The present invention relates to an optical connection structure configured to connect an optical waveguide device and an optical fiber including cores having different refractive indexes, wherein an optical connection component using a planar lightwave circuit is bonded and fixed on an end surface of an input/output waveguide of the optical waveguide device, a value of a refractive index of a core of the planar lightwave circuit is between a value of the refractive index of the core of the optical waveguide device and a value of the refractive index of the core of the optical fiber, and the optical waveguide device and the optical fiber are optically connected via the planar lightwave circuit.

An optical cable subassembly includes a plurality of optical fibers; at least one light coupling unit with a coupling unit attachment area configured to receive and hold a free end of each optical fiber of the plurality of optical fibers at a coupling unit pitch; and a cable retainer adapted to be installed in a housing and having a retainer attachment area with a plurality of spaced-apart retainer fiber alignment features arranged at a retainer pitch, each of the plurality of optical fibers disposed in and attached to one of the plurality of retainer fiber alignment features.

An optical assembly includes stacked planar lightwave circuit (PLC) members each having a plurality of waveguides in a respective plane, to provide optical connections to two-dimensional arrays of external optical waveguides (e.g., optical fiber cores), with one array including non-coplanar groups of waveguides having group members that are alternately arranged in a lateral direction. An optical assembly may provide optical connections between array of cores having a different pitch and/or orientation to serve as a fanout interface. Methods for fabricating an optical assembly are further provided.

The present disclosure relates to a ferrule boot that provides a pitch conversion from fiber ribbon having a first pitch (e.g., about 200 microns) to a multi-fiber ferrule having fiber openings arranged at a second pitch larger than the first pitch (e.g., about 250 microns). The ferrule boot may also function as a tool for inserting pitch converted optical fibers into the multi-fiber ferrule.

An optical transceiver includes an input assembly, an output port, a fiber patch panel, multiple first optical fibers and multiple second optical fibers. The input assembly is arranged on a circuit board and has a first input port and a second input port. The fiber patch panel is arranged between the input assembly and the output port, and has multiple first fiber patch slots and multiple second fiber patch slots. The first optical fibers are connected to the first input port and the output port. The first optical fiber passes through the first fiber patch slot and the second fiber patch slot. The second optical fibers are connected to the second input port and the output port. The second optical fiber passes through the first fiber patch slot and the second fiber patch slot. The second fiber patch slot accommodates the first optical fiber and the second optical fiber.

A high fiber count, ferrule-terminated optical fiber cable assembly includes a high density two-dimensional array of optical fibers extending through a single aperture of a ferrule, with the optical fibers within the ferrule aperture each having a core, a cladding layer, and a hard coating layer (e.g., having an elastic modulus greater than 100 MPa). Hard coated optical fibers are arranged very close to (e.g., within two microns of, or in contact with) one another, with a substantially constant fiber pitch within the ferrule. A fusion splice region may be provided between ferrule terminated hard-coated optical fibers and conventional optical fibers lacking a hard coating. High optical fiber density and compact ferrule size permits a significant reduction in connector width, enabling a numerical reduction or elimination of staggered lengths of cable portions for coupling ultra-high density optical fiber cables.