IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0004536
(2011-01-11)
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| 등록번호 |
US-9590388
(2017-03-07)
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|
발명자
/ 주소 |
- Stephens, IV, Edward F.
- Feeler, Courtney Ryan
- Junghans, Jeremy Scott
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| 출원인 / 주소 |
- Northrop Grumman Systems Corp.
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| 대리인 / 주소 |
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| 인용정보 |
피인용 횟수 :
0 인용 특허 :
109 |
초록
▼
A laser system that allows transverse arrangement of laser emitters around a laser medium. The system includes a laser medium with a coolant source and electrical controls. A pump layer has a mounting surface, an opposite bottom surface and a center aperture through which the laser medium is inserte
A laser system that allows transverse arrangement of laser emitters around a laser medium. The system includes a laser medium with a coolant source and electrical controls. A pump layer has a mounting surface, an opposite bottom surface and a center aperture through which the laser medium is inserted. Laser diode emitters are disposed on the mounting surface circumferentially around the laser medium. An intermediate layer has at least one radial channel in fluid communication with the coolant conduit. The intermediate layer is in contact with the bottom surface. A middle layer has micro-channels formed therethrough and a center aperture. The micro-channels are radially arranged around the center aperture and the middle layer is in contact with the intermediate layer. The coolant source is fluidly coupled to the micro-channels to allow coolant to be directed through the microchannels and the radial channel to impinge on the bottom surface.
대표청구항
▼
1. A micro channel cooled laser apparatus, comprising: a laser medium having a central axis;a pump layer having a mounting surface, an opposite bottom surface and a center aperture through which the laser medium is inserted;a plurality of laser diode emitters disposed on the mounting surface of the
1. A micro channel cooled laser apparatus, comprising: a laser medium having a central axis;a pump layer having a mounting surface, an opposite bottom surface and a center aperture through which the laser medium is inserted;a plurality of laser diode emitters disposed on the mounting surface of the pump layer circumferentially around the laser medium and emitting light directed at the laser medium;an intermediate layer having at least one radial channel, the intermediate layer in contact with the bottom surface of the pump layer;a middle layer having a plurality of micro-channels formed therethrough and a center aperture, the micro-channels being arranged around the center aperture, the middle layer in contact with the intermediate layer; anda coolant source fluidly coupled to the micro-channels via a conduit to allow coolant to be directed from the conduit through the micro-channels, wherein the micro-channels have a substantially smaller cross-section for coolant flow than the conduit to direct the coolant in a direction generally parallel to the central axis of the laser medium to form coolant jets to impinge on the bottom surface of the pump layer and flow through the at least one radial channel after impinging on the bottom surface. 2. The laser apparatus of claim 1, wherein the pump layer is a high thermal conductive material. 3. The laser apparatus of claim 2, wherein the high thermal conductive material is one of aluminum nitride or beryllium oxide. 4. The laser apparatus of claim 1, wherein the laser diode emitters are single laser diode emitters with a single light emission region. 5. The laser apparatus of claim 1, wherein the laser diode emitters are laser diode bars with a plurality of light emission stripes. 6. The laser apparatus of claim 1, wherein each of the plurality of laser diode emitters is mounted on a proximal end of a corresponding radial conductor disposed on the mounting surface of the pump layer, the radial conductors having an opposite distal end including an open-circuit bypass circuit, the open-circuit bypass circuit providing an electrical connection to a neighboring radial conductor if the corresponding laser diode emitter fails. 7. The laser apparatus of claim 6, further comprising a positive conductor and a negative conductor formed on the mounting surface of the pump layer, the positive conductor and negative conductor coupled in series to the plurality of laser emitters and the open-circuit bypass circuits via the radial conductors to supply voltage to the plurality of laser emitters. 8. The laser apparatus of claim 1, wherein the pump layer includes a plurality of coolant conduits located around the circumference of the pump layer and wherein the radial channel is one of a plurality of radial channels of the intermediate layer that in combination provide the plurality of micro-channels fluid access to the bottom surface of the pump layer opposite the plurality of laser diode emitters. 9. The laser apparatus of claim 1 wherein the layers are circular in shape and the aperture is substantially circular. 10. The laser apparatus of claim 1, further comprising: a lower intermediate layer coupled to the middle layer, the lower intermediate layer including a center aperture and a plurality of radial channels, each of the radial channels of the lower intermediate layer having a proximal end and a distal end near the aperture in fluid communication with the plurality of micro-channels; anda bottom layer coupled to the lower intermediate layer, the bottom layer including a center aperture and a plurality of inlet conduits each in fluid communication with the proximal end of a corresponding radial channel of the lower intermediate layer. 11. A laser pump module comprising: a laser medium having a length;a plurality of ceramic coolers arranged along the length of the laser medium, each of the plurality of ceramic coolers including multiple layers having internal coolant flow channels for passing coolant fluid therethrough, each of the plurality of ceramic coolers having a center aperture through which the laser medium is positioned; anda plurality of groups of emitters for emitting energy in a direction transverse to the length, each of the groups of emitters being mounted on a corresponding one of the ceramic coolers such that the emitters are individually emitting energy toward the center aperture and into the laser medium, wherein the ceramic coolers include a layer having a plurality of micro-channels to form and direct coolant jets generally parallel to the length of the laser medium to impinge a back surface of one of the ceramic coolers opposite the groups of emitters, the plurality of micro-channels receiving coolant from a conduit, wherein the micro-channels have a substantially smaller cross-section for coolant flow than the conduit. 12. The laser pump module of claim 11, wherein each ceramic cooler includes at least one inlet and outlet for delivering coolant to the neighboring ceramic cooler. 13. The laser pump module of claim 11, wherein each ceramic cooler includes a layer having a mounting surface holding the groups of emitters and an opposite bottom surface, the coolant flow channels causing impingement flow of the coolant on the opposite bottom surface from the groups of emitters. 14. The laser pump module of claim 11, wherein each of the groups of emitters are mounted on a radial conductor, the radial conductor being coupled via a fault tolerant diode to an adjacent radial conductor. 15. A laser pump system comprising: a laser medium having a length;a plurality of laser emitters emitting energy in a direction transverse to the length of the laser medium, each of the plurality of laser emitters wired in a series circuit;a pump layer having a mounting surface supporting the laser emitters, an opposite bottom surface, a center aperture and at least one fluid conduit located near the circumference of the pump layer; andan intermediate layer having a channel system to form coolant jets by forcing coolant through micro-channels and to guide the coolant jets to contact against the bottom surface of the pump layer substantially opposite the laser emitters and flow through the channel system to the at least one fluid conduit. 16. The laser pump system of claim 15, further comprising a micro-channel layer disposed between the intermediate layer and the pump layer, the micro-channel layer including the plurality of micro-channels guiding the coolant in a direction generally parallel to the length of the laser medium, wherein the channel system includes a recess that supplies coolant fluid to the micro-channels to cause coolant fluid to impinge on the bottom surface of the pump layer and wherein the opposite bottom surface of the pump layer has a recess having fluid access to the micro-channels, the recess having fluid access to the fluid conduit to return the coolant fluid. 17. The laser pump system of claim 16, wherein the channel system includes at least one conduit to guide coolant flow to another coolant manifold resting on the coolant manifold. 18. The laser pump system of claim 15, further comprising a micro-channel layer disposed under the intermediate layer and the pump layer, the micro-channel layer including a plurality of micro-channels guiding the coolant in a direction generally parallel to the length of the laser medium, wherein the channel system includes a plurality of radial channels for collecting coolant fluid from the micro-channels and guiding the coolant fluid through the fluid conduit of the pump layer. 19. The laser pump system of claim 18, wherein the channel system of the intermediate layer includes at least one channel running under the bottom surface of the pump layer and an inlet for the coolant fluid, the channel allowing coolant fluid to exit through the fluid conduit of the pump layer. 20. The laser pump system of claim 15, wherein the laser emitters are single laser diode emitters with a single light emission region or laser diode bars with a plurality of light emission stripes. 21. The micro channel cooled laser apparatus of claim 1, wherein each of the micro-channels are disposed on the middle layer to be in substantial alignment directly under an area of the bottom surface of the pump layer opposite one of the plurality of laser diode emitters.
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