This disclosure generally relates to high-speed fiber optic networks that use light signals to transmit data over a network. The disclosed subject matter includes devices and methods relating to lens receptacles and/or optoelectronic subassemblies. In some aspects, the disclosed devices and methods relate to a lens receptacle including a receptacle body extending between a receptacle top and a receptacle bottom, the receptacle body including: a port body defining a receptacle port with a port opening at the receptacle top; a receptacle window defining a base of the receptacle port; a lens array including lenses positioned on the receptacle window; and at least one receptacle alignment feature.

A photoinduced refractive index-changing material is coupled directly to both a first port and a second port. An optical interconnect structure (for optically coupling the first port to the second port) is formable in the photoinduced refractive index-changing material by selectively exposing a portion of the photoinduced refractive index-changing material. The selective exposure induces a refractive index change in the photoinduced refractive index-changing material. The change in refractive index provides the waveguiding properties of the optical interconnect structure.

Methods of depositing materials to provide for efficient coupling of light from a first device to a second device are disclosed. In general, these methods include mounting one or more wafers on a rotating table that is continuously rotated under one or more source targets. A process gas can be provided and one or more of the source targets powered while the wafers are biased to deposit optical dielectric films on the one or more wafers. In some embodiments, a shadow mask can be laterally translated across the one or more wafers during deposition. In some embodiments, deposited films can have lateral and/or horizontal variation in index of refraction and/or lateral variation in thickness.

An illumination apparatus, which is to be connected to a light source apparatus that generates laser light and which is to be attached to an optical cable that guides the laser light, is provided. The illumination apparatus includes a light-emitting module which is to be attached to a tip portion of the optical cable. The light-emitting module receives the laser light emitted from the optical cable, converts the laser light into light having a different wavelength of a predetermined color, and emits the light. A heat dissipating lens case includes a lens and dissipates heat generated by the light-emitting module. The lens controls distribution of the light emitted by the light-emitting module. The heat dissipating lens case includes an attachment structure which allows the heat dissipating lens case to be removably attached to the light-emitting module.

Opto-electric on-board including opto-electronic elements on a substrate and an optical coupling, device for transferring optical signals between the opto-electronic elements and a complementary optical cable connector. The optical coupling device includes a prism with a contact face and a lower face and two or more supports spacing each the lower face from the oppositely arranged opto-electronic elements. Each support includes one or more feet attached to the substrate.

A photoelectric conversion connector comprising a support, a photoelectric conversion element that is provided on said support and that can be connected to an optical fiber through an optical signal, a first resin member that is formed at the upper part of the photoelectric conversion element, and a second resin member that is formed at the upper part of the first resin member. An optical signal transmitted between the photoelectric conversion element and the optical fiber goes through both the first resin member and the second resin member.

Light is excited by a light source in a first waveguide mode. The light is converted to a second waveguide mode via a channel waveguide having a cross-sectional geometry normal to a direction of propagation of the light that rotates a polarity of the first waveguide mode to a second waveguide mode. The light in the second waveguide mode is delivered to a near-field transducer that provides electromagnetic heating for a heat assisted magnetic recording write head.

Technologies are generally described to communicatively couple an optical fiber to an optical element using a polymer layer. An optical fiber may be coupled to an optical element, such as an optical waveguide or another optical fiber, using a layer of rewritable photorefractive polymer positioned between the optical fiber and the optical element. Light from a light source may be applied to the optical fiber to initiate a transient photorefractive effect in the polymer layer facilitating corrections of misalignment. A path of high refractive index may be formed in the polymer layer, where the path of high refractive index communicatively couples the optical fiber to the optical element reducing alignment concerns and increasing alignment tolerances of optical elements. In some examples, the path of high refractive index may be re-established by rewriting the polymer layer through another application of light from the light source if the communicative coupling is disrupted.

Optical connectors for connecting optical fiber to a light source are disclosed. In one embodiment, an optical connector includes a housing with a first end having an open aperture and a second end having a blind aperture. A chamber is disposed in the housing such that the optical axis of the housing passes through the chamber. The chamber includes a first material. A light collecting region formed from a second material is disposed in the housing between the second end of the housing and the chamber. A blind aperture is positioned in the light collecting region such that a termination of the blind aperture is spaced apart from the chamber by at least a portion of the second material. A refracting surface is disposed in the housing between the open aperture and the light collecting region such that the optical axis of the housing passes through the refracting surface.

An optical module includes: a stem; a temperature control module; a carrier; a light emitting element fixed on a light emitting element fixing surface of the carrier, having a front surface and a rear surface opposite to each other, emitting signal light from a first emission point in the front surface, and emitting back light from a second emission point in the rear surface; a light receiving element fixed on the carrier by a light receiving element fixing surface; a lens cap; and a lens, wherein a reflecting surface is provided on the carrier, the light receiving element receives the back light reflected by the reflecting surface, and a center of a light receiving surface of the light receiving element is positioned between the front surface and the rear surface in an optical axis direction of the signal light.