An optical module includes a light emitting assembly. The light emitting assembly includes a plurality of lasers, a plurality of wavelength division multiplexers and a lens group. The plurality of lasers emit a plurality of optical signals. The plurality of wavelength division multiplexers multiplex the plurality of optical signals into a plurality of composite optical signals. The lens group includes a first lens, a second lens, and a third lens. The second lens is configured to transmit a first part of the plurality of composite optical signals exited from the first lens, reflect a second part of the plurality of composite optical signals exited from the third lens to the first lens, and transmit the second part of the plurality of composite optical signals reflected by the first lens, so as to multiplex the plurality of composite optical signals into the merge composite optical signal.

A first portion of incoming light and a second portion of incoming light travel in opposite directions within a first optical waveguide. A ring resonator in-couples the first portion of incoming light and the second portion of incoming light from the first optical waveguide, such that the first portion of incoming light and the second portion of incoming light travel in opposite directions within the ring resonator. A second optical waveguide is disposed to in-couple the first portion of incoming light and the second portion of incoming light couple from the ring resonator, such that the first portion of incoming light and the second portion of incoming light travel in opposite directions within the second optical waveguide away from the ring resonator. One or more photodetector(s) are optically connected to receive the first portion of incoming light and the second portion of incoming light from the second optical waveguide.

A photonics package may include a substrate, a hanging connector, and a fast-axis collimator (“FAC”). The hanging connector is typically affixed to a side of the substrate other than the side through which a light output is emitted. The hanging connector may be L-shaped in cross-section, having a base section and an extended section projecting from the base section. The base section affixes to the substrate while the extended section affixes to the FAC, so that the FAC extends downward along the emitter surface of the substrate; a vertex of the FAC is coplanar with an emitter outputting the light output.

An optical transceiver that is hot-pluggable to an external device includes: an IC-TROSA including first to third internal fibers extending from a first surface of a package on a side opposite to the device in the first direction; a first substrate on which the IC-TROSA is mounted; a second substrate electrically connected to a light source and the first substrate and to which the light source is attached to generate reference light; a first sleeve provided on the second internal fiber; a second sleeve provided on the third internal fiber; and a fiber tray in which the substrates are mounted in an upper portion and the fibers are housed in a lower portion by being bent greater than a predetermined radius of curvature. The second substrate is arranged between the first and second sleeves and the first substrate in the first direction.

Structures including an edge coupler and methods of fabricating a structure including an edge coupler. The structure includes an edge coupler having a longitudinal axis, a first ring resonator, and a second ring resonator. The first ring resonator has a first center point that is spaced from the longitudinal axis of the edge coupler by a first perpendicular distance. The second ring resonator has a second center point that is spaced from the longitudinal axis of the edge coupler by a second perpendicular distance.

Disclosed are an optical assembly and a manufacturing method therefor. The optical assembly comprises a laser component (2) and a crystal (1). The crystal (1) is disposed on the laser component (2). The laser component (2) is used to produce a laser beam. The crystal (1) is used to split the laser beam incident onto the crystal (1) so as to generate a first beam (15) and a second beam (16). The first beam (15) is used for front light emission and the second beam (16) is used for backlight monitoring. The optical assembly can split a laser beam to achieve the backlight monitoring function without adding a splitter film. It has good stability in light splitting and reduces the risk of failure in an optical device.

An optical module includes a base plate, a carrier, an optical semiconductor device, an optical lens component, and a transmissive resin member in a cured state disposed between the optical semiconductor device and the optical lens component. The optical semiconductor device has an optical end surface, and emits an outgoing beam from the optical end surface or receives an incoming beam at the optical end surface. The optical lens component has a first lens surface and a second lens surface, the first lens surface facing the optical end surface of the optical semiconductor device, the first lens surface being provided between the optical end surface and the second lens surface. The transmissive resin contains either an optical path of the outgoing beam or an optical path of the incoming beam between the optical end surface of the optical semiconductor device and the first lens surface of the optical lens component.

Aspects of the present disclosure describe methods for reducing guided acoustic wave Brillouin (GAWBS) noise in an optical fiber that may be included in an optical communications system by reducing the polarization diffusion length of the fiber by increasing the birefringence of the optical fiber, the increased birefringence of the optical fiber being increased with respect to its average magnitude. Additionally, the polarization diffusion length is reduced by reducing the coherence length of birefringence of the optical fiber.

A butterfly-type packaged optical transceiver with multiple transmission and reception channels includes a box-shaped housing, a cover plate, an optical receiving module, an optical emitting module, a polarizing prism module, an optical fiber connector and electrical connection elements. The sealed housing encloses the optical receiving module, the optical emitting module, and the polarizing prism module. Electrical connection elements penetrate both side surfaces of the housing and are in contact with the optical fiber connector and the optical receiving module and the optical emitting module. A first incoming optical signal is transmitted to the optical receiving module via the optical fiber connector, the through hole, and the prism module, and the optical emitting module emits an outgoing second optical signal through the prism module, the through hole, and the optical fiber connector.

The invention describes an apparatus that implements efficient coupling between a photonic integrated circuit (PIC) and a second optical element such as a fiber or laser, while at the same time allowing for efficient polarization management and/or optical isolation. It enables the packaging of PICs with large single mode fiber counts and in- and out-coupling of light with arbitrary polarization. The apparatus comprises a glass interposer that contains at least one polarization selective element together with a pair of lenses transforming a beam profile between the 2nd optical element and a polarization selective coupler on the PIC. The invention also comprises a method for fabricating the apparatus based on a subassembly of building blocks that are manufactured using wafer-scale high-precision glass-molding and surface treatment(s) such as thin-film coating.