# US 2014/0233883 A1 · Resonator optimisation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0233883 A1 - Document ID: US20140233883A1 - Status: Published application - Kind: A1 - Application number: 14/351,851 - Filed: 2012-10-09 - Published: 2014-08-21 - Earliest claimed: 2011-10-14 - Assignees: Astrium GmbH - Applicants: Astrium Limited - Inventors: Stephen Sweeney; Yaping Zhang - Web page: https://patentgrep.com/patent/US20140233883A1 ## CPC - G02B 6/12004: {Combinations of two or more optical elements} - G02B 6/29343: {Cascade of loop resonators} - G02B 6/29335: {Evanescent coupling to a resonator cavity, i.e. between a waveguide mode and a resonant mode of the cavity (wavelength selective means based on resonator cavity coupled non-evanescently G02B6/29356, G02B6/29358)} - G02B 6/29338: {Loop resonators} - G02B 6/29341: {Loop resonators operating in a whispering gallery mode evanescently coupled to a light guide, e.g. sphere or disk or cylinder (evanescent coupling for sensing fluorescence G01N21/648)} - G02B 6/29389: {Bandpass filtering, e.g. 1x1 device rejecting or passing certain wavelengths (G02B6/2938 takes precedence)} - G02B 6/29391: {Power equalisation of different channels, e.g. power flattening} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A device comprising: a substrate; a plurality of resonators on the substrate, each of the resonators of the plurality of resonators being resonant at a predetermined wavelength of electromagnetic radiation and at least some of the resonators being arranged to operate in different resonance orders; a waveguide on the substrate, the waveguide being coupled to the plurality of resonators for guiding the electromagnetic radiation to the plurality of resonators, wherein the resonance order of each resonator along the waveguide is optimised to maximise the coupling of light into the resonators. ## Claims ### Claim at position 1 1-15. (canceled) ### Claim 16 A device comprising: a substrate; a plurality of resonators on the substrate, each of the resonators of the plurality of resonators being resonant at a predetermined wavelength of electromagnetic radiation and at least some of the resonators being arranged to operate in different resonance orders; and a waveguide on the substrate, the waveguide being coupled to the plurality of resonators for guiding electromagnetic radiation to the plurality of resonators, wherein a resonance order of each resonator along the waveguide is selected to provide a maximum coupling of light into the resonators. ### Claim 17 (depends on 16) A device according to claim 16, wherein each resonator operates in an order selected to provide minimum bend losses in the resonator, and to provide a free-spectral range of the resonator that is larger than an operating spectral bandwidth of the device. ### Claim 18 (depends on 16) A device according to claim 16, wherein the device is configured to detect electromagnetic radiation in a range of wavelengths, the range of wavelengths including adjacent wavelengths, and wherein two resonators resonant at adjacent wavelengths operate in different orders. ### Claim 19 (depends on 16) A device according to claim 16, wherein a position of each resonator along the waveguide is selected to provide a minimum loss of radiation at predermined wavelengths of interest in the waveguide. ### Claim 20 (depends on 19) A device according to claim 19, wherein a resonator of the plurality of resonators with a shorter resonant wavelength is positioned closer to a beginning of the waveguide than a resonator of the plurality of resonators with a longer resonant wavelength. ### Claim 21 (depends on 16) A device according to claim 16, wherein the plurality of resonators are disk resonators. ### Claim 22 (depends on 16) The device of claim 16, wherein the device is included in a spectrometer. ### Claim 23 A method of configuring a device having a substrate, a plurality of resonators on the substrate, each of the plurality of resonators being resonant at a predetermined wavelength of electromagnetic radiation, and a waveguide on the substrate, the waveguide being coupled to the plurality of resonators for guiding the electromagnetic radiation to the plurality of resonators, the method comprising: selecting predetermined wavelengths of interest; determining a target wavelength for each resonator from the wavelengths of interest; and determining a resonance order of each resonator of the plurality of resonators such that the resonant wavelength of the resonator falls at the target wavelength for that resonator and such that resonance depth is increased, a resonance order of at least one resonator being different than a resonance order of at least one other resonator of the plurality of resonators. ### Claim 24 (depends on 23) A method of claim 23, wherein determining the order of each resonator comprises: determining an order that provides a free-spectral range of the resonator that is larger than an operating spectral bandwidth of the device, and such that a bend loss of the resonator is reduced. ### Claim 25 (depends on 23) A method according to claim 23, wherein the wavelengths of interest include a set of wavelengths having adjacent wavelengths, and determining the order comprises: determining the order of a resonator such that a size of the resonator is different than a size of resonators for coupling lights at adjacent wavelengths. ### Claim 26 (depends on 23) A method according to claim 23, comprising: selecting a position of each resonator, relative to the other resonators, along the waveguide to provide a minimum loss of radiation at the wavelengths of interest in the waveguide. ### Claim 27 (depends on 26) A method according to claim 26, wherein determining the position of the resonator comprises: placing a resonator of the plurality of resonators with a shorter resonant wavelength closer to a beginning of the waveguide than a resonator of the plurality of resonators with a longer resonant wavelength. ### Claim 28 (depends on 23) A method according to claim 23, wherein the plurality of resonators are disk resonators. ### Claim 29 (depends on 23) A device comprising: a substrate; a plurality of resonators on the substrate, each of the resonators of the plurality of resonators being resonant at a predetermined wavelength of electromagnetic radiation; and a waveguide on the substrate, the waveguide being coupled to the plurality of resonators for guiding the electromagnetic radiation to the plurality of resonators, wherein a resonance order of each resonator along the waveguide is selected according to the method of claim 23. ### Claim 30 (depends on 27, 29) A device according to claim 29, wherein a position of each resonator along the waveguide is selected according to the method of claim 27. ### Claim 31 (depends on 17) A device according to claim 17, wherein the device is configured to detect electromagnetic radiation in a range of wavelengths, the range of wavelengths including adjacent wavelengths, and wherein two resonators resonant at adjacent wavelengths operate in different orders. ### Claim 32 (depends on 31) A device according to claim 31, wherein a position of each resonator along the waveguide is selected to provide a minimum loss of radiation at predermined wavelengths of interest in the waveguide. ### Claim 33 (depends on 32) A device according to claim 32, wherein a resonator of the plurality of resonators with a shorter resonant wavelength is positioned closer to a beginning of the waveguide than a resonator of the plurality of resonators with a longer resonant wavelength. ### Claim 34 (depends on 33) A device according to claim 33, wherein the plurality of resonators are disk resonators. ### Claim 35 (depends on 34) The device of claim 34, wherein the device is included in a spectrometer.