An optical assembly may include a platform disposed within a housing that has a limited space. The platform may be tilted by a first angle to fit a fiber array into the limited space of the housing. The optical assembly may also include a silicon photonics device mounted on the tilted platform. The silicon photonics device may include a grating coupler. The optical assembly may also include the fiber array directly coupled to the grating coupler on the silicon photonics device at a coupling position that deviates from a vertical coupling position by a second angle.

An optical transceiver includes a groove-shaped accommodating portion that extends in a longitudinal direction, the housing being configured to be inserted and removed from a cage of an external device. The optical transceiver includes a movable member attached to the housing and a leaf spring member accommodated in the accommodating portion. The spring member includes a first pressing portion pressing a protrusion toward a first surface of the accommodating portion. The spring member includes and a second pressing portion pressing, in the longitudinal direction, a second surface of the accommodating portion. An end of the spring member toward the first pressing portion is configured to curve away from the first surface of the accommodating portion in the longitudinal direction as a distance from first pressing portion increases.

The present disclosure provides an optical module, including: an optical sub-module and a first housing; where a first sub-surface of the optical sub-module is provided with a first boss, and the first housing is provided with a first opening corresponding to the first boss. The improved structure of the optical module can greatly increase heat conduction efficiency of the optical module.

A compact, wavelength-stabilized laser source is provided by utilizing a specialty gain element (i.e., formed to include a curved waveguide topology), where a separate wavelength stabilization component (for example, a fiber Bragg grating (FBG)) is used one of the mirrors for the laser cavity. That is, the FBG takes the place of the physical “front facet” of the gain element, and functions to define the laser cavity in the first instance, while also utilizing the grating structure to impart the desired wavelength stability to the output from the packaged laser source. As a result, the FBG is disposed within the same package used to house the gain element and provides a wavelength-stabilized laser source in a compact form.

An optical amplifier module is configured as a multi-stage free-space optics arrangement, including at least an input stage and an output stage. The actual amplification is provided by a separate fiber-based component coupled to the module. A propagating optical input signal and pump light are provided to the input stage, with the amplified optical signal exiting the output stage. The necessary operations performed on the signal within each stage are provided by directing free-space beams through discrete optical components. The utilization of discrete optical components and free-space beams significantly reduces the number of fiber splices and other types of coupling connections required in prior art amplifier modules, allowing for an automated process to create a “pluggable” optical amplifier module of small form factor proportions.

In an example, a method may include dispensing a portion of epoxy on a first surface. The method may also include curing the portion of epoxy to form precured epoxy. The method may also include positioning the first surface and a second surface separated from each other by a gap. The precured epoxy is located within the gap between the first surface and the second surface. The method may also include dispensing bulk epoxy into the gap and in contact with the precured epoxy, the first surface, and the second surface. The method may also include curing the bulk epoxy to bond the first surface to the second surface.

An articulate joint mechanism includes a first link (L1, A1, M1, U1), a second link (L2, A2, M2, U2), a coupling (KR, KR1, ER, ER1, ER2, MR, UR) mechanically connecting the first link with the second link in a mutually moveable manner at least with one degree of freedom, and an optical fiber cable (11, 21, 31, 41) extending from the first link to the second link via the coupling, the optical fiber cable including a fiber cable core (F1, F2, F3, F4) and a sheath (C1, C2, C3, C4) surrounding the fiber cable core. The joint mechanism comprises a first cable retaining part (P1) provided in a part of the first link and including a sheath fixing part (P1-2) for fixedly securing the sheath to the first link and a core fixing part (P1-1) for fixedly securing the fiber cable core to the first link, and a first cable engaging part (Q1) provided in a part of the first link located between the first cable retaining part and the coupling and including a sheath fixing part (Q1-2) for fixedly securing the sheath to the first link while allowing the optical fiber core to deflect freely.

It is an object of the present invention to accurately maintain a positional relationship between a lens held in a holding member and an optical fiber without requiring any complicated operation. The invention includes a holder (11), at one end of which a housing section (11c) that houses a ball lens (12) is formed and at the other end of which an insertion hole (11a) for inserting an optical fiber (13) is formed, and a magnet (14) provided outside in a direction crossing a housing direction of the ball lens at the one end of the holder, in which the magnet generates an attracting force for aligning a center of the ball lens with a center of an optical element provided in a coupling target.

An optical module includes a housing including an optical interface, a circuit board module disposed in the housing, a fiber optic receptacle module disposed in the housing and including a plurality of fiber optic receptacles, an optoelectronic chip disposed in the housing and electrically connected to the circuit board module, a position limiting card disposed behind the fiber optic receptacle module, and a plurality of through holes arranged at the optical interface. The plurality of fiber optic receptacles are installed at the optical interface and fit through the plurality of through holes, and the position limiting card is fixed to the housing and locks the fiber optic receptacle module tightly against the optical interface.

Methods for providing flammability protection for plastic optical fiber (POF) embedded inside avionics line replaceable units (LRUs) or other equipment used in airborne vehicles such as commercial or fighter aircrafts. A thin and flexible flammability protection tube is placed around the POF. In one proposed implementation, a very thin (100 to 250 microns in wall thickness) polyimide tube is placed outside and around the POF cable embedded inside an LRU or other equipment. The thin-walled polyimide tube does not diminish the flexibility of the POF cable.