Laser package having multiple emitters configured on a support member

Patent metadata

Field	Value
Publication number	US-9835296-B2
Application number	US-201615159595-A
Country	US
Kind code	B2
Filing date	May 19, 2016
Priority date	Jan 24, 2011
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A method and device for emitting electromagnetic radiation at high power using nonpolar or semipolar gallium containing substrates such as GaN, AlN, InN, InGaN, AlGaN, and AlInGaN, is provided. In various embodiments, the laser device includes plural laser emitters emitting green or blue laser light, integrated a substrate.

First claim

What is claimed is:

1. An optical module apparatus comprising:
a support member;
at least one laser diode device configured to emit a laser beam; wherein the laser diode device comprises a gallium and nitrogen containing laser diode device configured to emit a laser beam characterized by emission selected from violet emission with a wavelength ranging from 395 nm to 425 nm, blue emission with a wavelength ranging from 415 nm to 485 nm, or green emission with a wavelength ranging from 500 nm to 560 nm;
a phosphor material;
one or more optical fibers configured to optically couple the laser beam to the phosphor material; and
an optical device configured to receive the laser beam, and to provide an output beam characterized by a selected wavelength range, a selected spectral width, a selected power, and a selected spatial configuration; wherein:
the support member is configured to transport thermal energy from the laser diode device to a heat sink;
the optical device comprises free-space optics configured to create one or more free space optical beams;
a thermal path from the laser diode device to the heat sink is characterized by a thermal impedance; and

the optical module apparatus is characterized by an optical output power degradation of less than 20% in 500 hours when the optical module apparatus is operated within the optical output power with a constant input current at a base temperature of 25 degrees Celsius.

2. The apparatus of claim 1 , further comprising a laser diode device comprising an AlInGaP laser diode device configured to emit a laser beam characterized by red emission with a wavelength ranging from 625 nm to 665 nm; wherein the optical device comprise a combiner, and further comprising a plurality of laser devices, whereupon the laser device is one of the plurality of laser devices.

3. The apparatus of claim 1 , further comprising an electrical input interface configured to couple electrical input power to the laser diode device or a plurality of laser diode devices; and wherein the electrical input interface is configured to couple radio frequency electrical inputs to the laser diode device or wherein the electrical input interface is configured to couple logic signals to the laser diode device.

4. The apparatus of claim 1 , wherein the laser diode device is one of a plurality of laser diode devices operable in an environment comprising at least 150,000 ppm oxygen gas; wherein each of the plurality of laser diode devices is substantially free from efficiency degradation over a time period from the oxygen gas.

5. The apparatus of claim 1 , wherein the support member comprises a material selected from copper, aluminum, silicon, and a combination of any of the foregoing; and
further comprising a micro-channel cooler thermally coupled to the support member or further comprising a heat spreader coupled between the support member and the laser device.

6. The apparatus of claim 1 , wherein the phosphor material is configured to operate in a mode selected from a reflective mode, a transmissive mode, and a combination of a reflective mode and a transmissive mode; and
wherein the phosphor material is coupled to an optical element or to a metal.

7. The apparatus of claim 1 , wherein the phosphor material is thermally coupled to the support member along a continuous thermal gradient toward a selected portion of a heat sink region within a vicinity of the support member.

8. The apparatus of claim 1 , wherein the output beam is geometrically configured to optimize an interaction with the phosphor material from a first efficiency to a second efficiency.

9. The apparatus of claim 1 , further comprising a combiner configured to provide the output beam characterized by a selected spatial pattern having a maximum width and a minimum width.

10. The apparatus of claim 1 , further comprising a submount member characterized by a coefficient of thermal expansion (CTE) coupled to the support member and the heat sink;
and further comprising one or more submount members coupling the laser diode device to the support member.

11. The apparatus of claim 10 , wherein the one or more submount members comprises a material selected from aluminum nitride, BeO, diamond, composite diamond, and a combination of any of the foregoing.

12. The apparatus of claim 1 , further comprising a submount attached to the support member, the submount being characterized by a thermal conductivity of at least 200 W/(mk); and wherein the laser diode device is directly thermally coupled directly to the support member.

13. The apparatus of claim 1 , wherein the laser diode device is overlies an oriented surface region selected from a non-polar gallium and nitrogen containing oriented surface region and a semipolar gallium and nitrogen containing oriented surface region.

14. The apparatus of claim 13 , wherein
the oriented surface region is a semipolar orientation characterized by the {20-21} or {20-2-1} plane; and
a laser stripe region overlies the oriented surface region; wherein the laser stripe region is oriented in the projection of the c-direction.

15. The apparatus of claim 1 , wherein the free space optics comprises a fast-axis collimation lens; and
further comprising an optical fiber, wherein the output beam is coupled into the optical fiber.

16. The apparatus of claim 1 , wherein the output beam is characterized by a spectral width of at least 4 nm; and N ranges from 3 to 50; or wherein the output beam is characterized by a spectral width of less than 4 nm; and N ranges from 3 to 50.

17. An optical module apparatus comprising:
a support member;
at least one laser diode device overlying the support member, the at least one laser diode device configured to emit a laser beam; wherein
the at least one laser diode device comprises gallium and nitrogen and is configured to emit a laser beam characterized by emission selected from violet emission with a wavelength ranging from 395 nm to 425 nm, blue emission with a wavelength ranging from 415 nm to 485 nm, green emission with a wavelength ranging from 500 nm to 560 nm, and a combination thereof;
a combiner configured to receive at least one laser beam from the at least one laser diode device; and to provide an output beam characterized by a selected wavelength range, a selected spectral width, a selected power, and a selected spatial configuration;
a phosphor material optically coupled to the output beam, wherein
the support member is configured to transport thermal energy from the at least one laser diode device to a heat sink;
the output beam is characterized by an optical output power of at least 5 W; and
a thermal path from the laser device to the heat sink is characterized by a thermal impedance of less than 4 degrees Celsius per electrical watt of input power.

18. An optical module apparatus comprising:
a support member;
at least one laser diode device overlying the support member, the at least one laser diode device configured to emit a laser beam; wherein
the at least one laser diode device comprises gallium and nitrogen, is characterized by a nonpolar or semipolar oriented surface region, and is configured to emit a laser beam characterized by emission selected from violet emission with a wavelength ranging from 395 nm to 425 nm, blue emission with a wavelength ranging from 415 nm to 485 nm, green emission with a wavelength ranging from 500 nm to 560 nm, and a combination thereof;
a laser stripe region overlying the nonpolar or semipolar surface region; wherein each laser stripe region is oriented in a c

Assignees

• Soraa Laser Diode Inc

Inventors

• Goutain Eric
• Raring James W
• Rudy Paul
• Huang Hua

Classifications

• H10W72/5524

  comprising aluminium [Al] · CPC title

• H01S5/0425

  Electrodes, e.g. characterised by the structure · CPC title

• H01S5/04256

  characterised by the configuration · CPC title

• F21V9/32

  characterised by the arrangement of the photoluminescent material · CPC title

• H01S5/2201

  in a specific crystallographic orientation · CPC title