An optical device package includes a semiconductor substrate, and an optical device. The semiconductor substrate has a first surface, a second surface different in elevation from the first surface, and a profile connecting the first surface to the second surface. A surface roughness of the profile is greater than a surface roughness of the second surface. The optical device is disposed on the second surface and surrounded by the profile.

An optical connector module having a plurality of discrete optical benches inputting/outputting optical signals, each including: a base defining an array of reflective surfaces and supporting an array of optical fiber array defining optical channels with inputs/outputs in optical alignment with corresponding reflective surfaces, thereby forming optical inputs/outputs of the corresponding optical bench. A carrier commonly supports the optical benches, with the optical benches fixedly mount thereon in a desired spatial arrangement with the optical inputs/outputs of the optical benches matching optical inputs/outputs of the external optical component. The carrier is structured to physically connect to the external component. The carrier includes passive alignment features for demountable coupling to the external component, wherein the carrier is at least one of directly mounted to the top of the external component, or detachably mounted to the external component via a receptacle or foundation positioned relative to the inputs/outputs of the external component.

Aspects and techniques of the present disclosure relate to an alignment device that includes a groove-type alignment structure with a support region for receiving an optical fiber inserted along a fiber insertion axis. The optical fiber has a first side and a second, opposite side. The groove-type alignment structure engages the first side of the optical fiber. The alignment device includes a stabilization structure that engages the first side of the optical fiber and a first angled transition surface that engages the second, opposite side of the optical fiber. The present disclosure also relates to an alignment system that includes a first housing piece; a second housing piece adapted to mate with the first housing piece; and a flat structure positioned between the first and second housing pieces.

A track system for routing an optical fiber includes a track for selectively retaining the optical fiber therein, a cover piece which is mounted to the track, and a corner piece which is mounted to the track. The track is formed as an elongated member and includes a pair of legs that are spaced apart from each other to define a slot and an internal channel into which the optical fiber is received. The cover piece is mountable to the track to help retain the optical fiber in the track.

A capillary includes a capillary main body made of glass and formed in an elongated shape. The capillary main body includes an accommodating portion configured to accommodate a part of an optical fiber. The accommodating portion includes an opening portion, which is formed in a first end surface of the capillary main body and is configured to allow insertion of the optical fiber. The capillary main body includes a compressive stress layer, which is formed on an opening portion and is observable by a two-dimensional birefringence measurement method, a tensile stress layer, which is formed at a position away from the compressive stress layer toward a second end surface of the capillary main body and is observable by the two-dimensional birefringence measurement method and a stress-neutral layer, which is formed between the compressive stress layer and the tensile stress layer and is observable by the two-dimensional birefringence measurement method.

Perimeter external surfaces of a 2D arrays of stripped optical fibers are used as datum surfaces for alignment structures for mating connectors in fiber optic cable assemblies. 2D fiber arrays may include involutions and/or protrusions to serve as mating locations for alignment structures and/or to serve as keying structures. A removable sleeve may be positioned around at least a portion of a 2D fiber array to align mating connectors and/or bias alignment structures toward one another. Fiber-free areas may be provided in an interior of a 2D fiber array to receive alignment structures. One or more compliant members may be configured to press first and second alignment structures toward one another proximate to a 2D fiber array. A cable assembly fabrication method includes forming window stripping and adhering optic fiber groups while preventing adhesive material from protruding beyond outermost surfaces of optical fibers at a perimeter of a fiber array. Multiple 2D fiber arrays with peripheral protective structures may be received in a connector sleeve and biased toward one another.