Abstract: An optical transceiver module and an optical cable module are disclosed. The optical cable module comprises an optical cable and the optical transceiver module connected to the optical cable. The optical transceiver module comprises a substrate, at least one optical receiving device and a plurality of hermetic transmitting devices. The plurality of hermetic transmitting devices are disposed on the substrate, wherein each of the hermetic transmitting devices includes an optical transmitter, and the optical transmitters of the hermetic transmitting devices are completely sealed in one or more than one hermetic housing.

Abstract: An example demultiplexer may include at least one dispersive element that is common to multiple wavelength channels. The demultiplexer may additionally include multiple field lenses positioned optically downstream from the at least one dispersive element, where a number of the field lenses is equal to a number of the wavelength channels. An example multiplexer may include a single piece power monitor assembly that includes a collimator lens array, a focusing lens array, and a slot integrally formed therein. The collimator lens array may be positioned to receive multiple wavelength channels from a laser array. The focusing lens array may be positioned to focus multiple portions of the wavelength channels onto an array of photodetectors. The slot may be configured to tap the portions from the wavelength channels collimated into the single piece power monitor assembly by the collimator lens array and to direct the portions toward the focusing lens array.

Abstract: A waveguide crossing includes a first waveguide and a second waveguide intersecting the first waveguide such that a gap equal to a width of the second waveguide is formed in the first waveguide, the second waveguide having a centerline defining a plane of symmetry. The first waveguide has a first waveguide section through which a single optical mode propagates, followed by a first non-adiabatic diverging taper, followed by a second waveguide section wider than the first waveguide section through which two even-order optical modes propagate, followed by a second non-adiabatic diverging taper, followed by a third waveguide section wider than the second waveguide section through which three even-order optical modes propagate. The three even-order modes synthesize to form a quasi-Gaussian beam that self-replicates symmetrically across the gap, thereby providing a low-loss waveguide crossing useful for photonic switching.

Abstract: Single heterogeneous crystals are described that contain multiple regimes, adjacent regimes varying from one another with regard to function. Also disclosed is a hydrothermal epitaxial growth process that can be utilized to form the single heterogeneous crystals. The single heterogeneous crystals can exhibit enhanced performance when used as a laser gain medium as compared to previously known single crystals and multi-crystal constructs. The heterogeneous single crystal can be utilized for thin disk lasers and can minimize the thermal distortion effects at high powers. The heterogeneous crystal can also serve as an embedded waveguide.

Abstract: A system includes a substrate including a first row of first receptacles, a cradle including an opening and a spring member, connectors located within the opening, and cables connected to the connectors. The cradle is configured to connect each of the connectors simultaneously or nearly simultaneously to a corresponding first receptacle, and the spring member pushes on the connectors with a force greater than an insertion force of the first receptacle.

Abstract: Structures and techniques are described relating to the alignment of multicore fibers within a multifiber connector. These structures and techniques include: multicore fibers having a number of different shapes, including, for example, circular, elliptical, D-shaped, double D-shaped, and polygonal; multifiber ferrules, having a plurality of fiber guide holes therein of various shapes; alignment fixtures for aligning multicore fibers within multifiber ferrules; and various multicore fiber alignment techniques.

Abstract: An opto-electric hybrid module is provided. In the opto-electric hybrid module, a core and an electric circuit including electric circuit body portions and mounting pads are provided on a surface of an under-cladding layer of an optical waveguide. An optical element is mounted on the mounting pads with its electrodes in abutment against the mounting pads. The core is covered with the over-cladding layer, and a center portion of the optical element is positioned above a portion of the over-cladding layer covering a top surface of the core. A portion of the electric circuit excluding the mounting pads and a surface portion of the under-cladding layer present between the electric circuit body portions of the electric circuit and present between the electric circuit body portion and the mounting pad are covered with a core material layer formed of the same material as the core.

Abstract: Embodiments of the present disclosure are directed toward techniques and configurations for phase offset adjustment in an electro-optical modulator. In one embodiment, the apparatus may include an electro-optical modulator having first and second arms, to modulate light passing through the arms according to an electrical data signal provided to the electro-optical modulator, to output an optical data signal that combines first and second light portions outputted by the first and second arms respectively; and a control module to convert the first and second light portions into first and second power signals indicative of respective phases of the first and second light portions, determine a balance between the first and second power signals, and adjust a phase of one of the first or second light portions, to achieve a bias point to provide the balanced optical data signal. Other embodiments may be described and/or claimed.

Abstract: Plane-polarized laser-radiation from a laser-source is converted to circularly polarized radiation by a quarter-wave plate. The circularly polarized radiation is input into a hollow-core fiber for transport to a point of use. The transported radiation is converted back to plane-polarized radiation by another quarter-wave plate between the fiber and the point of use.

Abstract: Techniques are disclosed for filling gaps formed between a press-fit component and an optical subassembly housing to introduce a seal or barrier that can prevent or otherwise mitigate the ingress of contaminants. In an embodiment, a layer of sealant material is applied to one or more surfaces of an optical component prior to press-fitting the component into an optical subassembly housing. Alternatively, or in addition to applying sealant to one or more surfaces of an optical component, a layer of sealant material may be disposed on an interface formed between an outer surface of the optical subassembly housing and the optical component press-fit into the same. Techniques disclosed herein are particularly well suited for small form-factor optical subassemblies that include one or more optical components press-fit into openings of a subassembly housing during manufacturing.

Abstract: An optical module that implements an MMI device including an optical hybrid primarily made of semiconductor material is disclosed. The MMI device, which has a rectangular plane shape and includes multi-mode couplers, is mounted on a carrier. The carrier provides a step extending in a whole lateral width of a top surface thereof, where the step makes a gap against the MMI device in an area where the MMI couplers are formed.

Abstract: An optical device and an optic transceiver device are provided. The optical device includes a light splitting surface. The optical device further includes a first surface and a second surface disposed opposite to each other and parallel to each other. The light splitting surface separately intersects the first surface and the second surface. An angle between the light splitting surface and the first surface is not equal to 90 degrees. A medium between the light splitting surface and the first surface and a medium between the light splitting surface and the second surface are the same. The medium is formed by a light transmissive material.

Abstract: A flexible optical substrate allows incident light or optical signals to be propagated or transmitted the flexible optical substrate. The flexible optical substrate includes unitary elastic structures. Each of the unitary elastic structures includes a film-like resin material that has a central portion and one or more strips provided outwardly of the central portion. One end of each of the one or more strips is connected to the central portion. Each of the unitary elastic structures has a clearance. Two adjacent unitary elastic structures are linked by at least part of the strips of the two adjacent unitary elastic structures.

Abstract: An optical waveguide device includes a wiring board; an optical waveguide having a first cladding layer, a core layer and a second cladding layer formed in this order on the wiring board; an optical path conversion mirror formed in the core layer; and an optical element mounted on the second cladding layer, the optical element comprising a light emitting portion or a light receiving portion protruding from a lower side thereof. The second cladding layer has an opening formed above the optical path conversion mirror. The optical element is mounted on the second cladding layer so that at least one end thereof is positioned above the opening of the second cladding layer. The light emitting portion or light receiving portion of the optical element is arranged the opening of the second cladding layer.

Abstract: A waveguide including a substrate, a plurality of cladding layers, a first dielectric layer, a second dielectric layer, and a third dielectric layer. The cladding layers are present on the substrate and define at least one tunnel therein, in which at least one of the cladding layers is made of metal. The first dielectric layer is disposed in the tunnel and has a first refractive index N1. The second dielectric layer is disposed in the tunnel and has a second refractive index N2. The third dielectric layer is disposed in the tunnel and has a third refractive index N3, and N2>N1 and N2>N3, in which the second dielectric layer is present between the first and third dielectric layers.

Abstract: A non-reciprocal coupler isolator is provided including a first waveguide. The first waveguide includes a magnetic cladding cover layer magnetized transversely to a propagation direction of the first waveguide. A second waveguide is positioned adjacent to the first waveguide and separated by a gap. The second waveguide includes a non-magnetic cladding cover layer with a refractive index that matches a refractive index of the magnetic cladding cover layer of the first waveguide.

Abstract: A method and apparatus for imaging using a double-clad fiber is described.

Abstract: In one embodiment, an optical splitter/coupler may be created by i) providing an optical waveguide having a first waveguide channel core, ii) forming an angular trench at an end of the first waveguide channel core, the angular trench establishing first and second facets within the first waveguide channel core, and iii) mirroring the first and second facets, wherein the mirrored first and second facets are configured to provide optical reflection into and/or from respective second and third waveguide channel cores located at correspondingly opposing sides of the first waveguide channel core.

Abstract: An optical connector connectable to another optical connector includes an optical waveguide that includes a core, an attachment part to which the optical waveguide is attached, a lens part in which a positioning hole is formed, and a positioning pin that is provided on the attachment part and inserted through the positioning hole. The lens part and the attachment part are joined with the positioning pin being inserted into the positioning hole.

Abstract: A high harmonic optical generator comprising a laser arrangement for emitting a beam of polarized radiation at a fundamental frequency and an optical waveguide having a hollow core for a gaseous harmonic generation medium for the generation of high harmonics of the fundamental frequency, the optical waveguide having an optical propagation axis along the hollow core, the laser arrangement is configured to couple the beam of polarized radiation along the propagation axis of the hollow core optical waveguide to provide a beam of optical driving radiation for the high harmonic generation, the optical driving radiation having a plane of polarization that rotates about the propagation axis.