# US 2023/0054560 A1 · Microled parallel optical interconnects > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0054560 A1 - Document ID: US20230054560A1 - Status: Published application - Kind: A1 - Application number: 17/820,483 - Filed: 2022-08-17 - Published: 2023-02-23 - Earliest claimed: 2021-08-17 - Assignees: AvicenaTech, Corp. - Inventors: Robert Kalman; Bardia Pezeshki; Alexander Tselikov; Cameron Danesh - Web page: https://patentgrep.com/patent/US20230054560A1 ## CPC - G02B 6/4249: {comprising arrays of active devices and fibres} - G02B 6/4206: {Optical features (G02B6/4207, G02B6/421 take precedence)} - G02B 6/4214: {the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device (G02B6/4246 takes precedence)} - G02B 6/4295: {coupling with semiconductor devices activated by light through the light guide, e.g. thyristors, phototransistors} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract Parallel optical interconnects may be used to transmit signals produced by integrated circuits. A parallel optical interconnect may be in the form of a multicore optical fiber and one or more optical coupling assemblies optically connecting a first optical transceiver array and a second optical transceiver array. The multicore optical fiber may have multiple fiber elements with each having a core surrounded by cladding, and the one or more optical coupling assemblies may have refractive and/or reflective elements. In this way, light produced by one transceiver array may be transmitted through the multicore optical fiber and be received by the other transceiver array. ## Claims ### Claim 1 A parallel optical interconnect assembly for optically coupling integrated circuits, comprising: a first optical transceiver array having a plurality of optical transmitters; the plurality of optical transmitters each having a drive circuit connected to a microLED; a multicore optical fiber configured to transmit light emitted by each microLED of the plurality of optical transmitters; a first optical coupling assembly to couple light to the first end of the multicore optical fiber, the first optical coupling assembly having a first refractive lens separated from the first optical transceiver array by a first distance equaling to a first focal length of the first refractive lens, a second refractive lens separated from a first end of the multicore optical fiber by a second distance equaling to a second focal length of the second refractive lens, with the first and second refractive lenses being separated from each other by a third distance equal to the first distance and the second distance combined; a second optical transceiver array having a plurality of optical receivers; each of the plurality of optical receivers having a photodetector connected to a receiver circuit; and a second optical coupling assembly having one or more refractive collectors configured to direct light transmitted from a second end of the multicore optical fiber to each photodetector of the plurality of optical receivers. ### Claim 2 (depends on 1) The parallel optical interconnect assembly of claim 1, wherein the first optical coupling assembly further comprises a reflecting element between the first optical transceiver array and the first refractive lens. ### Claim 3 (depends on 2) The parallel optical interconnect assembly of claim 2, wherein the reflective element is a turning mirror orientated 45 degrees relative to a normal axis of each microLED of the plurality of optical transmitters. ### Claim 4 (depends on 1) The parallel optical interconnect assembly of claim 1, wherein the multicore optical fiber comprises at least two segments that are joined by a junction. ### Claim 5 (depends on 4) The parallel optical interconnect assembly of claim 4, wherein the junction comprises an optical connector and a connector sleeve. ### Claim 6 (depends on 1) The parallel optical interconnect assembly of claim 1, wherein each photodetector of the plurality of optical receivers are monolithically integrated on an integrated circuit. ### Claim 7 (depends on 1) The parallel optical interconnect assembly of claim 1, wherein each photodetector of the plurality of optical receivers are bonded to an integrated circuit. ### Claim 8 (depends on 1) The parallel optical interconnect assembly of claim 1, wherein the multicore optical fiber comprises a bundle of multiple fiber elements, each fiber element having a core surrounded by cladding. ### Claim 9 (depends on 1) The parallel optical interconnect assembly of claim 1, wherein the multicore optical fiber comprises a bundle of multiple fiber elements, each fiber element having a core surrounded by a concentric cladding. ### Claim 10 (depends on 9) The parallel optical interconnect assembly of claim 9, wherein a space between the multiple fiber elements contains a filler material. ### Claim 11 (depends on 9) The parallel optical interconnect assembly of claim 9, wherein a space between the multiple fiber elements is empty. ### Claim 12 (depends on 1) The parallel optical interconnect assembly of claim 1, wherein each microLED of the plurality of optical transmitters is coupled to multiple cores of the multicore optical fiber. ### Claim 13 (depends on 1) The parallel optical interconnect assembly of claim 1, wherein each microLED of the plurality of optical transmitters is coupled to a single core of the multicore optical fiber.