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1. 发明授权

US10658817B2 Vertical cavity surface emitting laser 有权
公开(公告)号：US10658817B2
公开(公告)日：2020-05-19
申请号：US16167644
申请日：2018-10-23
申请人： PHILIPS PHOTONICS GMBH
发明人： Philipp Henning Gerlach , Roger King
IPC分类号： H01S5/00 , H01S5/183 , H01S5/42
摘要： The disclosure relates to a Vertical Cavity Surface Emitting Laser (100) comprising a first electrical contact (105), a substrate (110), a first Distributed Bragg Reflector (115), an active layer (120), a second Distributed Bragg Reflector (130) and a second electrical contact (135). The Vertical Cavity Surface Emitting Laser comprises at least two current aperture layers (125) arranged below or above the active layer (120), wherein each of the current aperture layers (125) comprises one AlyGa(1−y)As-layer, wherein a first current aperture layer (125a) of the at least two current aperture layers (125) is arranged nearer to the active layer (120) as a second current aperture layer (125b) of the at least two current aperture layers (125), wherein the first current aperture layer (125a) comprises a first current aperture (122a) with a bigger size as a second current aperture (122b) of the second current aperture layer (125b). The disclosure also relates to a method of manufacturing such a VCSEL (100).

2. 发明申请

US20190383717A1 METHOD OF DETERMINING OPERATION CONDITIONS OF A LASER-BASED PARTICLE DETECTOR 审中-公开
公开(公告)号：US20190383717A1
公开(公告)日：2019-12-19
申请号：US16558184
申请日：2019-09-02
申请人： Philips Photonics GmbH
发明人： Ulrich WEICHMANN , Joachim Wilhelm HELLMIG , Alexander Marc VAN DER LEE , Holger Joachim MOENCH
IPC分类号： G01N15/02 , H01S5/183 , G01N15/14
摘要： A method for determining operating conditions of a particle detector that includes a multimode Vertical Cavity Surface Emitting Laser (VCSEL) includes providing an electrical drive current to the multimode VCSEL such that a laser beam is emitted by the multimode VCSEL and varying the electrical drive current within a predefined range of electrical drive currents. The method further includes determining, as a function of the electrical drive current, an intensity signal of an optical wave within a laser cavity of the multimode VCSEL, determining, as a function of the electrical drive current, a noise measure of the intensity signal, determining a range of electrical drive currents for which the noise measure is below a predefined threshold noise measure value, and determining operating conditions of the particle detector by choosing an electrical drive current for particle detection out of the determined low noise range of electrical drive currents.

3. 发明授权

US10379028B2 Laser sensor for multi parameter detection 有权
公开(公告)号：US10379028B2
公开(公告)日：2019-08-13
申请号：US15748207
申请日：2016-07-15
申请人： PHILIPS PHOTONICS GMBH
发明人： Johannes Hendrikus Maria Spruit , Alexander Marc Van Der Lee , Gerben Kooijman , Okke Ouweltjes , Joachim Wilhelm Hellmig , Arnoldus Johannes Martinus Jozeph Ras , Petrus Theodorus Jutte
IPC分类号： G01N15/14 , G01S17/58 , G01S17/95 , G01B9/02 , G01N15/02 , G01N15/06 , G01S7/48 , G01S7/491 , G01S17/87 , G01S7/481 , G01N15/10
摘要： The invention describes a laser sensor module (100) which is adapted to detect or determine at least two different physical parameters by means of self-mixing interference by focusing a laser beam to different positions. Such a laser sensor module (100) may be used as an integrated sensor module, for example, in mobile devices (250). The laser sensor module (100) may be used as an input device and in addition as a sensor for detecting physical parameters in an environment of the mobile communication device (250). One physical parameter in the environment of the mobile communication device (250) may, for example, be the concentration of particles in the air (air pollution, smog . . . ). The invention further describes a related method and computer program product.

4. 发明授权

US10361531B2 Light emitting semiconductor devices with getter layer 有权
公开(公告)号：US10361531B2
公开(公告)日：2019-07-23
申请号：US15119502
申请日：2015-02-20
申请人： PHILIPS PHOTONICS GMBH
发明人： Ulrich Weichmann , Andreas Peter Engelhardt , Johanna Sophie Kolb , Marcel Franz Christian Schemmann , Holger Moench
IPC分类号： H01S5/00 , H01L33/10 , H01S5/183 , H01S5/343 , H01L21/00 , H01L21/265 , H01S5/30 , H01L33/00 , H01L33/02 , H01L33/30 , H01S5/022 , H01S5/042 , H01L33/12
摘要： The invention describes a light emitting semiconductor device (100) comprising a substrate (120), a light emitting layer structure (155) and an AlGaAs getter layer (190) for reducing an impurity in the light emitting layer structure (155), the light emitting layer structure (155) comprising an active layer (140) and layers of varying Aluminum content, wherein the growth conditions of the layers of the light emitting layer structure (155) comprising Aluminum are different in comparison to the growth conditions of the AlGaAs getter layer (190). The AlGaAs getter layer (190) enables a reduction of the concentration of impurities like Sulfur etc. in the gas phase of a deposition equipment or growth reactor. The reduction of such impurities reduces the probability of incorporation of the impurities in the light emitting layer structure (155) which may affect the lifetime of the light emitting semiconductor device (100). The growth conditions are chosen out of the group Arsenic partial pressure, Oxygen partial pressure, deposition temperature, total deposition pressure and deposition rate of Aluminum. The invention further relates to a corresponding method of manufacturing such a light emitting semiconductor device (100).

5. 发明授权

US10757758B2 Heating system for heating a living being 有权
公开(公告)号：US10757758B2
公开(公告)日：2020-08-25
申请号：US15860744
申请日：2018-01-03
申请人： PHILIPS PHOTONICS GMBH
发明人： Holger Moench , Mark Carpaij
IPC分类号： H05B1/00 , H05B3/02 , B60H1/22 , H05B1/02 , B60H1/00
摘要： The invention relates to a heating system for heating a living being, for instance, a person (2) within a vehicle (1) being preferentially a hybrid car or an electric car. The heating system comprises an infrared laser system (5, 6) for illuminating the living being with infrared laser light, thereby heating the living being. Thus, heating radiation is used, which has a high collimation and which can be focused relatively easily. The heating can therefore be confined to a certain region, in which the living being is located. The heating can even be confined to the living being or to parts of the living being only. This more focused heating allows for a reduction of the energy consumption.

6. 发明申请

US20200028329A1 INHERENTLY SAFE LASER ARRANGEMENT COMPRISING A VERTICAL CAVITY SURFACE EMITTING LASER 审中-公开
公开(公告)号：US20200028329A1
公开(公告)日：2020-01-23
申请号：US16585078
申请日：2019-09-27
申请人： PHILIPS PHOTONICS GMBH
发明人： Stephan Gronenborn , Holger Joachim Moench
IPC分类号： H01S5/183 , H01S5/42 , H01S5/042 , H01S5/10 , H01S5/00
摘要： A laser arrangement has an array of Vertical Cavity Surface Emitting Lasers (VCSELs) and an optical structure. The VCSELs are on a semiconductor substrate and have: first and second electrodes, first and second Bragg reflectors, and an active layer between the Bragg reflectors. The electrodes provide an electrical current across the active layer. The VCSELs are bottom emitters and emit laser light through the semiconductor substrate. The optical structure increases a laser emission angle of the laser light for eye safety. The optical structure includes a surface structure of the semiconductor substrate. A thickness of the semiconductor substrate is arranged such that laser light emitted by neighboring VCSELs intersect with each other in a plane of the surface structure. The surface structure is arranged such that a homogeneous emission of an emission surface of the semiconductor substrate is enabled.

7. 发明授权

US10416289B2 Infrared laser illumination device 有权
公开(公告)号：US10416289B2
公开(公告)日：2019-09-17
申请号：US15551320
申请日：2016-02-04
申请人： PHILIPS PHOTONICS GMBH
发明人： Joachim Wilhelm Hellmig , Pieter Hoeven , Robert Van Der Kloet , Holger Moench
IPC分类号： G01S7/481 , G01S17/89 , H01S5/42
摘要： The invention describes an illumination device (100) for illuminating a three dimensional arrangement (250) in an infrared wavelength spectrum. The illumination device (100) comprises at least a first group of laser devices (110) comprising at least one laser device (105) and at least a second group of laser devices (120) comprising at least one laser device (105). The first and the second group of laser devices (110, 120) are adapted to be operated independent with respect to each other. The first group of laser devices (110) is adapted to emit laser light with a first emission characteristic and the second group of laser devices (120) is adapted to emit laser light with a second emission characteristic different from the first emission characteristic. The invention further describes a distance detection device (150) and a camera system (300) comprising such an illumination device (100). The different emission characteristics may be used to compensate or take into account the depth of the three dimensional arrangement (250). Different parts of the three dimensional arrangement (250) may be illuminated by means of the first and second emission characteristic in different ways.

8. 发明授权

US10381802B2 Light emitting device 有权
公开(公告)号：US10381802B2
公开(公告)日：2019-08-13
申请号：US15762277
申请日：2016-09-22
申请人： PHILIPS PHOTONICS GMBH
发明人： Stephan Gronenborn , Michael Miller , Peter Dannberg , Mark Schuermann , Holger Moench
IPC分类号： H01S5/18 , H01S5/183 , H01S5/028 , H01S5/042 , H01S5/42 , H01S5/00 , H01S5/02
摘要： The invention describes a light emitting device (100). The light emitting device (100) comprises at least one light emitting structure (110), at least one processing layer (120) and at least one optical structure (130). The optical structure (130) comprises at least one material processed by means of processing light (150). The at least one processing layer (120) is arranged to reduce reflection of the processing light (150) in a direction of the optical structure (130) at least by 50%, preferably at least by 80%, more preferably at least by 95% and most preferably at least by 99% during processing of the material by means of the processing light (150). It is a basic idea of the present invention to incorporate a non- or low-reflective processing layer (120) on top of a light emitting structure (110) like a VCSEL array in order to enable on wafer processing of light emitting structures (130) like microlens arrays. The invention further describes a method of manufacturing such a light emitting device (100).

9. 发明授权

US10732091B2 Laser sensor for particle size detection 有权
公开(公告)号：US10732091B2
公开(公告)日：2020-08-04
申请号：US15746470
申请日：2016-08-01
申请人： PHILIPS PHOTONICS GMBH
发明人： Alexander Marc Van Der Lee , Joachim Wilhelm Hellmig , Johannes Hendrikus Maria Spruit
IPC分类号： G01C3/08 , G01N15/14 , G01S17/58 , G01N15/02 , G01S7/48 , G01S17/87 , G01S7/4912 , G01S17/95 , G01S7/481 , G01S17/08 , G01N15/00 , G01N15/10
摘要： The invention describes a laser sensor module (100) for particle size detection. The laser sensor module (100) comprises at least one first laser (110), at least one first detector (120), at least one electrical driver (130) and at least one evaluator (140). The first laser (110) is adapted to emit first laser light in reaction to signals provided by the at least one driver (130). The at least one first detector (120) is adapted to determine a first self-mixing interference signal (30) of an optical wave within a first laser cavity of the first laser (110). The first self-mixing interference signal (30) is caused by first reflected laser light reentering the first laser cavity, the first reflected laser light being reflected by a particle receiving at least a part of the first laser light. The evaluator (140) is adapted to determine a size of the particle by determining a first relative distance between the particle and the first laser (110) by means of the first self-mixing interference signal (30) and by determining a first amplitude information by means of the first self-mixing interference signal (30). The invention is further related to a corresponding method of determining a particle size.

10. 发明授权

US10707646B2 Compact laser device 有权
公开(公告)号：US10707646B2
公开(公告)日：2020-07-07
申请号：US16164209
申请日：2018-10-18
申请人： PHILIPS PHOTONICS GMBH
发明人： Philipp Henning Gerlach , Alexander Weigl
IPC分类号： H01S5/028 , H01L23/544 , H01S5/42 , H01S5/042 , H01S5/183 , H01L31/16 , H01S5/22 , H01L21/66
摘要： The invention describes a laser device comprising between two and six mesas (120) provided on one semiconductor chip (110), wherein the mesas (120) are electrically connected in parallel such that the mesas (120) are adapted to emit laser light if a defined threshold voltage is provided to the mesas (120). Two to six mesas (120) with reduced active diameter in comparison to a laser device with one mesa improve the yield and performance despite of the fact that two to six mesas need more area on the semiconductor chip thus increasing the total size of the semiconductor chip (110). The invention further describes a method of marking semiconductor chips (110). A functional layer of the semiconductor chip (110) is provided and structured in a way that a single semiconductor chip (110) can be uniquely identified by means of optical detection of the structured functional layer. The structured layer enables identification of small semiconductor chips (110) with a size below 200 μm×200 μm.

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