Optically Surface-Pumped Edge-Emitting Devices and Systems and Methods of Making Same

• US 20150288129A1
• Filed: 11/04/2013
• Published: 10/08/2015
• Est. Priority Date: 11/28/2012
• Status: Abandoned Application

• Current Assignee: VerLASE Technologies, LLC
• Original Assignee: VerLASE Technologies, LLC
• Inventors: Jain, Ajaykumar R.
• Application Number:
  US14/441,199
• Publication Number:
  US 20150288129A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01L 33/105 with a resonant cavity structure
• CPC Class Codes: H01S 3/063 Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength waveguide gas lasers H01S3/0315
• CPC Class Codes: H01S 3/0675 Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
• CPC Class Codes: H01S 3/06754 Fibre amplifiers H01S3/06708 takes precedence
• CPC Class Codes: H01S 3/094084 with pump light recycling, i.e. with reinjection of the unused pump light, e.g. by reflectors or circulators
• CPC Class Codes: H01S 3/0941 of a laser diode
• CPC Class Codes: H01S 5/041 Optical pumping
• CPC Class Codes: H01S 5/183 having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
• CPC Class Codes: H01S 5/50 Amplifier structures not provided for in groups H01S5/02 - H01S5/30

Abstract

Optical resonator devices and systems enhanced with photoluminescent phosphors and designed and configured to output working light in an edge-emitting fashion at one or more wavelengths based on input/pump light, and systems and devices made with such resonators. The edge-emitting functionality is enabled by providing one or more waveguides that direct light luminesced from the phosphors to one or more edges of the device. In some embodiments, the resonators contain multiple optical resonator cavities in combination with one or more photoluminescent phosphor layers or other structures. In other embodiments, the resonators are designed to simultaneously resonate at the input/pump and output wavelengths. The photoluminescent phosphors can be any suitable photoluminescent material, including semiconductor and other materials in quantum-confining structures, such as quantum wells and quantum dots, among others.

Claims

1. An optical system, comprising:

an optical device designed and configured to output working light of a first spectral composition in response to receiving pumping light of a second spectral composition different from the first spectral composition, said optical device including;

a plurality of layers having a stacking direction, first and second faces spaced along said stacking direction, and an edge extending between said first and second faces, wherein said plurality of layers are designed, arranged, and configured to define a resonator cavity designed and configured to resonate at a resonant frequency tuned to the second spectral composition;

a first photoluminescent layer located within said resonator cavity, said first photoluminescent layer designed and configured to create luminescence of the first spectral composition in response to stimulation by the pumping light when the pumping light is received through at least one of said first and second faces; and

a waveguide designed and configured as a function of said first spectral composition so as to guide the luminescence toward said edge so as to output the working light through said edge.

2. An optical system according to claim 1, wherein said waveguide is defined amongst said plurality of layers.

3. An optical system according to claim 2, wherein said waveguide is provided by a separate confinement heterostructure.

4. An optical system according to claim 2, wherein a first set of layers of said plurality of layers defines a first distributed Bragg reflector for said resonator cavity and a second set of layers of said plurality of layers defines a second distributed Bragg reflector for said resonator cavity, wherein said waveguide is defined amongst said first and second sets of layers.

5. An optical system according to claim 2, wherein a first set of layers of said plurality of layers defines a first non-distributed-Bragg reflector for said resonator cavity and a second set of layers of said plurality of layers defines a second non-distributed-Bragg reflector for said resonator cavity, wherein said waveguide is defined amongst said first and second sets of layers.

6. An optical system according to claim 2, wherein said waveguide comprises at least one absentee layer located amongst said plurality of layers.

7. An optical system according to claim 6, wherein said plurality of layers defines first and second distributed Bragg reflectors defining said resonator cavity, said waveguide comprising at least one absentee layer in each of said first and second distributed Bragg reflector.

8. An optical system according to claim 1, wherein said resonator cavity is located within said waveguide.

9. An optical system according to claim 1, wherein said resonator cavity has a midpoint axis perpendicular to said stacking axis, and said waveguide is concentric with said resonator cavity about said midpoint axis.

10. An optical system according to claim 1, wherein said resonator cavity has a midpoint axis perpendicular to said stacking axis, and said waveguide is eccentric with said resonator cavity about said midpoint axis.

11. An optical system according to claim 1, wherein said waveguide is located outside said resonator cavity.

12. An optical system according to claim 1, further comprising a light source located relative to said optical device so as to provide said pumping light to said first photoluminescent layer through at least one of said first and second faces.

13. An optical system according to claim 12, wherein said light source is formed integrally with said optical device.

14. An optical system according to claim 1, further comprising:

a first light source located relative to said optical device so as to provide a first portion of said pumping light to said first photoluminescent layer through said first face; and

a second light source located relative to said optical device so as to provide a second portion of said pumping light to said first photoluminescent layer through said second face.

15. An optical system according to claim 14, wherein each of said first and second light sources are formed integrally with said optical device.

16. An optical system according to claim 1, wherein said first photoluminescent layer has uniform thickness.

17. An optical system according to claim 1, wherein said first photoluminescent layer has varying thickness.

18. An optical system according to claim 1, wherein said plurality of layers further:

are designed, arranged, and configured to define a second resonator cavity designed and configured to resonate at a resonant frequency tuned to at least one of the second or a third spectral compositions;

include a second photoluminescent layer within said second resonator cavity, said photoluminescent layer designed and configured to create luminescence of said third spectral composition in response to stimulation by the pumping light when the pumping light is received through at least one of said first and second faces; and

are designed, arranged, and configured to define a second waveguide to guide the luminescence toward said edge so as to output working light of said third spectral composition through said edge.

19. An optical system according to claim 1, wherein said edge is a first edge and said plurality of layers has a second edge, said optical device further comprising a first feedback mirror extending along said second edge.

20. An optical system according to claim 19, wherein said second edge is located opposite said first edge.

21. An optical system according to claim 19, wherein said second edge is substantially perpendicular to said first edge.

22. An optical system according to claim 21, wherein said plurality of layers has a third edge spaced from said second edge, said optical device further comprising a second feedback mirror extending along said third edge.

23. An optical system according to claim 21, wherein said plurality of layers has a fourth edge spaced from said first edge, said optical device further comprising a third feedback mirror extending along said fourth edge.

24. An optical system according to claim 1, wherein the working light is composed substantially of a single wavelength.

25. An optical system according to claim 1, wherein the working light is composed of multiple wavelengths.

26. An optical system according to claim 1, wherein said optical device is an optically pumped laser.

27. An optical system according to claim 1, wherein said optical device is an optically pumped superluminescent light emitting device.

28. An optical system according to claim 1, wherein said optical device is a semiconductor optical amplifier.

29. A method of making an optical system that includes an optical device designed and configured to output working light from an edge of the optical device in response to being pumped with pumping light through a face of the optical device, the method comprising:

arranging and configuring a plurality of layers within the optical device so as to define at least one resonator cavity designed and configured to resonate at a spectral frequency of the pumping light;

providing a first photoluminescent layer within said at least one resonator cavity, wherein the first photoluminescent layer is designed and configured to provide luminescence in response to the pumping light; and

providing a waveguide to guide the luminescence toward the edge of the optical device so as to output the working light through the edge of the optical device.

30. A method according to claim 29, wherein said providing a waveguide includes arranging and configured ones of the plurality of layers so as to function as components of the waveguide.

31. A method according to claim 30, wherein said arranging and configuring a plurality of layers includes arranging and configured a first set of the plurality of layers to define a first distributed Bragg reflector and arranging an configuring a second set of the plurality of layers to define a second distributed Bragg reflector.

32. A method according to claim 30, wherein said arranging and configuring a plurality of layers includes arranging and configured a first set of the plurality of layers to define a first non-distributed-Bragg reflector and arranging an configuring a second set of the plurality of layers to define a second non-distributed-Bragg reflector.

33. A method according to claim 30, wherein said providing a waveguide include providing an absentee layer to the plurality of layers.

34. A method according to claim 29, wherein said providing a waveguide includes providing the optical device with a separate confinement heterostructure.

35. A method according to claim 29, wherein said providing a waveguide includes providing the waveguide adjacent to the at least one optical resonator cavity.

36. A method according to claim 29, wherein the at least one resonator cavity has a corresponding midpoint axis and said providing a waveguide includes providing the waveguide so that the waveguide is concentric with the at least one resonator cavity about the midpoint axis.

37. A method according to claim 29, wherein the at least one resonator cavity has a corresponding midpoint axis and said providing a waveguide includes providing the waveguide so that the waveguide is eccentric with the at least one resonator cavity about the midpoint axis.

38. A method according to claim 29, wherein said providing a first photoluminescent layer comprises providing the first photoluminescent layer with a uniform thickness.

39. A method according to claim 29, wherein said providing a first photoluminescent layer comprises providing the first photoluminescent layer with a varying thickness.

40. A method according to claim 29, further comprising providing a light source adjacent to the face and configuring the light source to provide the pumping light to the at least one resonator cavity through the face.

41. A method according to claim 40, wherein said providing a light source includes providing the light source so that it is integral with the plurality of layers.

42. A method according to claim 40, wherein the optical device has a second face and the method further comprises providing a second light source adjacent to the second face and configuring the second light source to provide the pumping light to that at least one resonator cavity through the second face.

43. A method according to claim 42, wherein said providing a second light source includes providing the second light source so that it is integral with the plurality of layers.

44. A method according to claim 29, further comprising:

arranging and configuring a plurality of layers within the optical device so as to define a second resonator cavity designed and configured to resonate at a spectral frequency of at least one of the pumping light and the working light;

providing a second photoluminescent layer within said second resonator cavity, wherein the photoluminescent layer is designed and configured to provide luminescence of a third spectral frequency in response to the pumping light; and

providing a second waveguide to guide the luminescence of said third spectral frequency toward the edge of the optical device so as to output the working light of said third spectral frequency through the edge of the optical device.

45. A method according to claim 29, wherein the edge is a first edge and the method further comprises providing a first feedback mirror to a second edge of the optical device.

46. A method according to claim 45, further comprising locating the second edge opposite the first edge.

47. A method according to claim 45, further comprising locating the second edge so as to be perpendicular to the first edge.

48. A method according to claim 47, further comprising:

providing a third edge spaced from the second edge; and

providing a second feedback minor to said third edge.

49. A method according to claim 47, further comprising:

providing a fourth edge spaced from the first edge; and

providing a third feedback minor to said fourth edge.

50. A method according to claim 29, further comprising tuning the optical device so that the working light is composed of substantially only one wavelength when subjected to the pumping light.

51. A method according to claim 29, further comprising tuning the optical device so that the working light is composed of multiple selected wavelengths.

52. A method according to claim 29, further comprising configuring the optical device so that it functions as a laser in response to the pumping light.

53. A method according to claim 29, further comprising configuring the optical device so that it functions as a superluminescent light emitting device in response to the pumping light.

54. A method according to claim 29, further comprising configuring the optical device so that it functions as a semiconductor optical amplifier in response to the pumping light.