# US 2019/0319733 A1 · On Chip Wavelength Multiplexing And Demultiplexing In Multimode Waveguide > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0319733 A1 - Document ID: US20190319733A1 - Status: Published application - Kind: A1 - Application number: 16/384,613 - Filed: 2019-04-15 - Published: 2019-10-17 - Earliest claimed: 2018-04-13 - Assignees: The Trustees of Columbia University in the City of New York - Applicants: The Trustees of Columbia University in the City of New York - Inventors: Michal Lipson; Mohammad Amin Tadayon - Web page: https://patentgrep.com/patent/US20190319733A1 ## CPC - G02B 6/43: Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections - G02B 6/12007: {forming wavelength selective elements, e.g. multiplexer, demultiplexer} - G02B 6/29364: {Cascading by a light guide path between filters or filtering operations, e.g. fibre interconnected single filter modules} - G02B 6/29368: {Light guide comprising the filter, e.g. filter deposited on a fibre end (G02B6/29359 takes precedence)} - G02B 6/2938: {for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM} - H04B 10/11: Arrangements specific to free-space transmission, i.e. transmission through air or vacuum - H04J 14/02: Wavelength-division multiplex systems - G02B 2006/12069: {Organic material} - G02B 2006/1209: {Multimode} - G02B 2006/12109: {Filter} - G02B 2006/12164: {Multiplexing; Demultiplexing} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H04B: TRANSMISSION - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) ## Abstract Example methods, devices, and systems for optical transmission are disclosed. An example method can comprise coupling a plurality of optical filters to a substrate. The method can comprise coupling a polymeric waveguide to the plurality of optical filters. The polymeric waveguide can be configured to guide a free space optical signal along the polymeric waveguide and communicate, via the plurality of optical filters, one or more components of the free optical space signal to an integrated chip. ## Claims ### Claim 1 A method, comprising: coupling a plurality of optical filters to a substrate; and coupling a polymeric waveguide to the plurality of optical filters, wherein the polymeric waveguide is configured to guide a free space optical signal along the polymeric waveguide and communicate, via the plurality of optical filters, one or more components of the free optical space signal to an integrated chip. ### Claim 2 (depends on 1) The method of claim 1, further comprising forming a plurality of filter seats on the substrate. ### Claim 3 (depends on 2) The method of claim 2, wherein coupling the plurality of optical filters to corresponding filter seats of the plurality of filter seats comprises physically coupling the plurality of optical filters to corresponding filter seats of the plurality of filter seats using an adhesive. ### Claim 4 (depends on 1) The method of claim 1, wherein coupling the polymeric waveguide to the plurality of optical filters comprises forming the polymeric waveguide. ### Claim 5 (depends on 4) The method of claim 4, wherein forming the polymeric waveguide comprises: forming a core comprising a first polymeric material having a first refractive index; and forming a cladding at least partially surrounding the core and comprising a second polymeric material having a second refractive index lower than the first refractive index. ### Claim 6 (depends on 5) The method of claim 5, wherein forming the core comprises causing the first polymeric material to flow between a mold and the substrate based on a capillary effect. ### Claim 7 (depends on 5) The method of claim 5, wherein forming the core comprises decreasing a temperature applied to one or more of a mold or a substrate at intervals to minimize defects in the polymeric waveguide. ### Claim 8 (depends on 1) The method of claim 1, wherein the plurality of optical filters comprise a first optical filter arranged at a first angle with respect to the polymeric waveguide and a second optical filter arranged at a second angle with respect to the polymeric waveguide, wherein the second angle is different than the first angle. ### Claim 9 (depends on 1) The method of claim 1, wherein the one or more components comprise one or more wavelengths of the free space optical signal. ### Claim 10 (depends on 1) The method of claim 1, wherein the integrated chip is configured to perform one or more of optical sensing, wireless communication between optical fibers, laser light analysis, or non-coherent light analysis. ### Claim 11 (depends on 1) The method of claim 1, wherein the polymeric waveguide comprises an optically transparent polymer, wherein the polymer comprises one or more of an epoxy based polymer, a hybrid polymer, an acrylic, or polyurethane. ### Claim 12 (depends on 1) The method of claim 1, wherein the plurality of optical filters are configured to de-multiplex the free space optical signal into the one or more components. ### Claim 13 (depends on 1) The method of claim 1, wherein the plurality of optical filters are configured to receive a plurality of light signals from the integrated chip and multiplex the plurality of light signals into a multimode light signal along the polymeric waveguide. ### Claim 14 (depends on 1) The method of claim 1, wherein the plurality of optical filters are optically coupled to a plurality of optical fibers configured to guide the one or more components to different portions of the integrated chip. ### Claim 15 A device, comprising: a polymeric waveguide configured to guide a free space optical signal along the polymeric waveguide; and a plurality of optical filters coupled with the polymeric waveguide and configured to guide one or more components of the free space optical signal to an integrated chip configured to process the one or more components of the free space optical signal. ### Claim 16 (depends on 15) The device of claim 15, wherein the integrated chip is configured to perform one or more of optical sensing, wireless communication between optical fibers, laser light analysis, or non-coherent light analysis. ### Claim 17 (depends on 15) The device of claim 15, wherein the polymeric waveguide comprises an optically transparent polymer, wherein the polymer comprises one or more of an epoxy based polymer, a hybrid polymer, an acrylic, or polyurethane. ### Claim 18 (depends on 15) The device of claim 15, wherein the plurality of optical filters are configured to de-multiplex the free space optical signal into the one or more components. ### Claim 19 (depends on 15) The device of claim 15, wherein the plurality of optical filters are configured to receive a plurality of light signals from the integrated chip and multiplex the plurality of light signals into a multimode light signal along the polymeric waveguide. ### Claim 20 (depends on 15) The device of claim 15, wherein the plurality of optical filters are optically coupled to a plurality of optical fibers configured to guide the one or more components to different portions of the integrated chip.