# US 2024/0201560 A1 · Radiation field provision device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0201560 A1 - Document ID: US20240201560A1 - Status: Published application - Kind: A1 - Application number: 18/394,311 - Filed: 2023-12-22 - Published: 2024-06-20 - Earliest claimed: 2021-06-24 - Assignees: Universitaet Stuttgart - Applicants: Universitaet Stuttgart - Inventors: Christoph Roecker; Pascal Weinert; Uwe Brauch; Marwan Abdou Ahmed - Web page: https://patentgrep.com/patent/US20240201560A1 ## CPC - G02F 1/353: {Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams} - G02F 1/3544: {Particular phase matching techniques} - G02F 1/3503: {Structural association of optical elements, e.g. lenses, with the non-linear optical device} - G02F 1/39: for parametric generation or amplification of light, infrared or ultraviolet waves - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract Proposed is a radiation field provision device, in which in particular an optical path for a radiation field is defined, comprising a frequency conversion body, wherein the frequency conversion body is partially formed from a frequency-converting medium and a reflector. ## Claims ### Claim 1 A radiation field provision device, in which an optical path for a radiation field is defined, comprising a frequency conversion body, wherein the frequency conversion body is partially formed from a frequency-converting medium and a reflector. ### Claim 2 (depends on 1) The radiation field provision device in accordance with claim 1, wherein in the case of a radiation field propagating along the optical path, a radiation field component, which is involved in a frequency conversion and is comprised by the radiation field, is at least partially converted by a frequency conversion in the frequency-converting medium into a radiation field component with a different frequency. ### Claim 3 (depends on 1) The radiation field provision device in accordance with claim 1, wherein a frequency conversion takes place at least along a reflected branch of the optical path. ### Claim 4 (depends on 1) The radiation field provision device in accordance with claim 1, wherein a frequency conversion takes place at least along an incident branch of the optical path. ### Claim 5 (depends on 1) The radiation field provision device in accordance with claim 1, wherein along one branch of the portion of the optical path running in the frequency conversion body no frequency conversion takes place in the case of a radiation field propagating along the optical path. ### Claim 6 (depends on 1) The radiation field provision device in accordance with claim 1, wherein an incident branch and a reflected branch of the optical path run symmetrically to a marked axis of the frequency-converting medium of the frequency conversion body. ### Claim 7 (depends on 1) The radiation field provision device in accordance with claim 1, wherein an incident branch and a reflected branch of the optical path run asymmetrically with respect to a marked axis of the frequency-converting medium of the frequency conversion body. ### Claim 8 (depends on 1) The radiation field provision device in accordance with claim 1, wherein the reflector is attached to the frequency-converting medium. ### Claim 9 (depends on 1) The radiation field provision device in accordance with claim 1, wherein the reflector is formed at least partially from the frequency-converting medium. ### Claim 10 (depends on 1) The radiation field provision device in accordance with claim 1, wherein a reflection surface of the reflector extends at least approximately perpendicularly to a marked axis of the frequency-converting medium of the frequency conversion body. ### Claim 11 (depends on 1) The radiation field provision device in accordance with claim 1, wherein a reflection surface of the reflector runs obliquely to a marked axis of the frequency-converting medium of the frequency conversion body. ### Claim 12 (depends on 1) The radiation field provision device in accordance with claim 1, wherein the reflector provides a reflected radiation field in which radiation field components involved in the frequency conversion fulfil conditions adapted for the frequency conversion. ### Claim 13 (depends on 1) The radiation field provision device in accordance with claim 1, wherein the reflector is formed in such a way that phase relationships between at least the radiation field components involved in the frequency conversion remain at least substantially unchanged by the reflector. ### Claim 14 (depends on 1) The radiation field provision device in accordance with claim 1, wherein the reflector comprises multiple layers. ### Claim 15 (depends on 1) The radiation field provision device in accordance with claim 1, wherein the reflector comprises at least one phase matching layer for phase matching at least one radiation field component involved in the frequency conversion. ### Claim 16 (depends on 1) The radiation field provision device in accordance with claim 1, wherein the reflector (120) comprises an optical grating. ### Claim 17 (depends on 1) The radiation field provision device in accordance with claim 1, wherein a surface of the frequency conversion body at one of an entry side, at which the optical path enters the frequency conversion body, and/or an exit side, at which the optical path exits the frequency conversion body, runs parallel to an intermediate surface on a reflector side of the part comprising the frequency-converting medium. ### Claim 18 (depends on 1) The radiation field provision device in accordance with claim 1, wherein a surface of the frequency conversion body at one of an entry side, at which the optical path enters the frequency conversion body, and/or an exit side, at which the optical path exits the frequency conversion body, runs obliquely to an intermediate surface on a reflector side of the part comprising the frequency-converting medium. ### Claim 19 (depends on 1) The radiation field provision device in accordance with claim 1, wherein a surface of the frequency conversion body at its entry side, at which the optical path enters the frequency conversion body, and a surface of the frequency conversion body at its exit side, at which the optical path exits the frequency conversion body, run obliquely to one another. ### Claim 20 (depends on 1) The radiation field provision device in accordance with claim 1, wherein the frequency conversion body (110) has a coating on at least one of a surface at an entry side and/or a surface at an exit side. ### Claim 21 (depends on 1) The radiation field provision device in accordance with claim 1, wherein the frequency conversion body is a thin body. ### Claim 22 (depends on 1) The radiation field provision device in accordance with claim 1, wherein the geometric embodiment of the frequency conversion body is such that an one-dimensional heat conduction takes place in it. ### Claim 23 (depends on 1) The radiation field provision device in accordance with claim 1, wherein at least one cooling body is arranged on a side of the frequency conversion body on which the reflector is formed. ### Claim 24 (depends on 1) The radiation field provision device in accordance with claim 1, wherein a front-side optical body is arranged on a side of the frequency conversion body forming at least on of an entry side and/or an exit side. ### Claim 25 (depends on 1) The radiation field provision device in accordance with claim 1, wherein the frequency conversion body is arranged outside at least one resonator. ### Claim 26 (depends on 1) The radiation field provision device in accordance with claim 1, wherein the frequency conversion body is arranged within at least one resonator.