# US 2019/0170314 A1 · Integrated planar reflective larp package and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170314 A1 - Document ID: US20190170314A1 - Status: Published application - Kind: A1 - Application number: 15/830,069 - Filed: 2017-12-04 - Published: 2019-06-06 - Earliest claimed: 2017-12-04 - Assignees: OSRAM GmbH; Osram Sylvania Inc. - Applicants: OSRAM GmbH; Osram Sylvania Inc. - Inventors: Alan L. Lenef; Joerg Sorg; Jan Oliver Drumm; Sergey Kudaev - Web page: https://patentgrep.com/patent/US20190170314A1 ## CPC - H01S 5/0087: {for illuminating phosphorescent or fluorescent materials, e.g. using optical arrangements specifically adapted for guiding or shaping laser beams illuminating these materials} - F21S 41/14: characterised by the type of light source - F21S 41/16: Laser light sources - F21S 41/176: Light sources where the light is generated by photoluminescent material spaced from a primary light generating element - F21S 41/192: {Details of lamp holders, terminals or connectors} - F21S 41/285: {Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805} - F21S 43/26: {Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255} - F21V 5/02: of prismatic shape (F21V5/04 takes precedence) - F21V 5/04: of lens shape - F21V 9/30: Elements containing photoluminescent material distinct from or spaced from the light source (shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40) - F21V 11/00: Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 (characterised by cooling arrangements F21V29/502) - F21V 31/005: {Sealing arrangements therefor} - H01S 5/0071: {for beam steering, e.g. using a mirror outside the cavity to change the beam direction} - H01S 5/02255: using beam deflecting elements - H01S 5/02257: using windows, e.g. specially adapted for back-reflecting light to a detector inside the housing - F21K 9/64: using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer - F21Y 2115/30: Semiconductor lasers - H01S 5/02216: Butterfly-type, i.e. with electrode pins extending horizontally from the housings - H01S 5/0222: Gas-filled housings - H01S 5/02325: Mechanically integrated components on mount members or optical micro-benches - H01S 5/0234: Up-side down mountings, e.g. Flip-chip, epi-side down mountings or junction down mountings - H01S 5/32341: {blue laser based on GaN or GaP} - H01S 5/34333: {with a well layer based on Ga(In)N or Ga(In)P, e.g. blue laser} - H01S: DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED ## Abstract A reflective laser activated remote phosphor (LARP) package comprising: a phosphor platelet oriented in a first plane defined by an x-y plane; a laser diode (LD) positioned to be offset along the x-axis from the phosphor platelet and above the first plane along a z-axis perpendicular to the x-y plane, the LD comprising: an output facet configured for emitting a laser beam (LB), the LB comprising: a slow axis oriented in a first direction along which the LB diverges at a first angle; and a fast axis oriented in a second direction along which the LB diverges at a second angle greater than the first angle; wherein the LD is oriented such that: the LB is bisected by the phosphor platelet such that the slow axis of the LB lies in an x-z plane and the fast axis of the LB is perpendicular to an x-z plane. ## Claims ### Claim 1 A reflective laser activated remote phosphor (LARP) package comprising: a phosphor platelet oriented in a first plane defined by a z-axis and a y-axis perpendicular to the z-axis; a laser diode positioned to be offset along the z-axis from the phosphor platelet and above the first plane along an x-axis perpendicular to the z-axis and the y-axis, the laser diode comprising: an output facet configured for emitting a laser beam, the laser beam comprising: a slow axis oriented in a first direction along which the laser beam diverges at a first angle; and a fast axis oriented in a second direction along which the laser beam diverges at a second angle greater than the first angle; wherein the laser diode is oriented such that the laser beam is bisected by the phosphor platelet such that the slow axis of the laser beam lies in a x-z plane and the fast axis of the laser beam is perpendicular to the x-z plane. ### Claim 2 (depends on 1) The LARP package of claim 1, further comprising: a phosphor pedestal positioned between the phosphor platelet and a substrate; and a laser diode pedestal positioned between the laser diode and the substrate. ### Claim 3 (depends on 2) The LARP package of claim 2, wherein the LARP package is hermetically sealed into an integrated package. ### Claim 4 (depends on 1) The LARP package of claim 1, further comprising a transparent window positioned in a y-z plane above the phosphor platelet such that at least a portion of a light emitted by the phosphor is transmitted through said window. ### Claim 5 (depends on 4) The LARP package of claim 4, the window further comprising a specular pump block positioned such that at least a portion of the window is rendered opaque. ### Claim 6 (depends on 2) The LARP package of claim 2, wherein a position of the laser diode is selected such that the angle of incidence corresponds to an angle exceeding the Brewster angle. ### Claim 7 (depends on 6) The LARP package of claim 6, wherein the position of the laser diode is further selected such that the angle of the laser diode on the laser diode pedestal such that an emission spot on a surface of the phosphor platelet is substantially circular. ### Claim 8 (depends on 1) The LARP package of claim 1, further comprising an optical element positioned between the laser diode and the phosphor platelet. ### Claim 9 A method of arranging a reflective laser activated remote phosphor (LARP) package comprising: orienting a phosphor platelet in a first plane defined by a z-axis and a y-axis perpendicular to the z-axis; positioning a laser diode to be offset along the z-axis from the phosphor platelet and above the first plane along an x-axis perpendicular to the z-axis and the y-axis, the laser diode comprising: an output facet configured for emitting a laser beam, the laser beam comprising: a slow axis oriented in a first direction along which the laser beam diverges at a first angle; and a fast axis oriented in a second direction along which the laser beam diverges at a second angle greater than the first angle; orienting the laser diode is such that the laser beam bisects the phosphor platelet such that the slow axis of the laser beam is in a x-z plane and the fast axis of the laser beam is perpendicular to the x-z plane. ### Claim 10 (depends on 9) The method of claim 9, further comprising: positioning a phosphor pedestal between the phosphor platelet and a substrate; and positioning a laser diode pedestal between the laser diode and the substrate. ### Claim 11 (depends on 9) The method of claim 9, further comprising hermetically sealing the LARP package into an integrated package. ### Claim 12 (depends on 11) The method claim 11, further comprising positioning a transparent window along the z-axis above the phosphor platelet such that at least a portion of a light emitted by the phosphor is transmitted through said window. ### Claim 13 (depends on 12) The method of claim 12, further comprising positioning a specular pump block such that at least a portion of the window is rendered opaque. ### Claim 14 (depends on 13) The method of claim 13, further comprising positioning the specular pump block to block transmission through said window of specular reflection of the laser beam from a surface of the phosphor platelet. ### Claim 15 (depends on 9) The method of claim 9, further comprising emitting the laser beam from an active region of the laser diode, wherein an electric field polarization is parallel to a plane of incidence onto the phosphor. ### Claim 16 (depends on 9) The method of claim 9, further comprising positioning an optical element between the laser diode and the phosphor platelet such that the optical element intercepts the laser beam. ### Claim 17 (depends on 10) The method of claim 10, further comprising positioning the laser diode at an angle on the laser diode pedestal such that an emission spot on the phosphor surface is substantially circular. ### Claim 18 (depends on 8) The LARP package of claim 8, wherein the optical element is configured to deflect the laser beam such that an emission spot on the phosphor surface is substantially circular.