Two-dimensional multi-beam stabilizer and combining systems and methods

Patent metadata

Field	Value
Publication number	US-9843154-B2
Application number	US-201615071554-A
Country	US
Kind code	B2
Filing date	Mar 16, 2016
Priority date	Feb 14, 2012
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A system and method for stabilizing and combining multiple emitted beams into a single system using both WBC and WDM techniques.

First claim

What is claimed:

1. A multi-beam stabilizer and combining system comprising:
a wavelength stabilizer having a dispersive dimension and a non-dispersive dimension, the wavelength stabilizer comprising:
an array of beam emitters each (i) having front and back facets and (ii) emitting a beam from the front facet,
one or more first optical elements (i) having power along the dispersive dimension of the wavelength stabilizer and (ii) arranged to receive the emitted beams and parallelize chief rays of the emitted beams, and
a first dispersive element arranged to receive the beams from the one or more first optical elements and disperse the beams into at least two orders, wherein one of the orders is reflected back to the array of beam emitters by a feedback element, thereby forming a resonator between the back facet of each beam emitter and the feedback element that stabilizes the beam emitted by each beam emitter to a unique wavelength; and

a wavelength combiner having a dispersive dimension and a non-dispersive dimension, the wavelength combiner comprising:
one or more second optical elements, different from the one or more first optical elements, arranged to receive the wavelength-stabilized beams and cause the beams to converge along a beam-combining dimension, and
a second dispersive element, different from the first dispersive element, positioned along a beam-combining dimension, to receive the plurality of converging beams, and transmit the beams as a multi-wavelength output.

2. The system of claim 1 , wherein the first dispersive element comprises a grating, a chirped grating, a surface grating, a volume grating, a transmission grating, or a prism.

3. The system of claim 1 , wherein the one or more first optical elements are telecentric.

4. The system of claim 1 , further comprising collimating optics for collimating the beams emitted by the array of beam emitters.

5. The system of claim 1 , wherein the array of beam emitters is one-dimensional or two-dimensional.

6. The system of claim 1 , wherein the feedback element is the first dispersive element.

7. The system of claim 1 , wherein the feedback element comprises a mirror arranged to receive one of the orders from the first dispersive element and reflect the received order back to the first dispersive element.

8. The system of claim 1 , wherein the feedback element comprises (i) a first mirror arranged to receive one of the orders from the first dispersive element and reflect the received order back to the first dispersive element, and (ii) a second mirror arranged to receive a different one of the orders from the first dispersive element and reflect the received order back to the first dispersive element.

9. The system of claim 8 , wherein the feedback element comprises one or more optical elements for imaging the beams onto the first mirror and/or the second mirror.

10. The system of claim 8 , wherein the feedback element comprises one or more quarter wave plates.

11. The system of claim 8 , wherein the feedback element comprises one or more slits for reduction of cross-talk between emitters.

12. The system of claim 1 , further comprising one or more third optical elements (i) having power along the non-dispersive dimension of the wavelength stabilizer and (ii) arranged to receive one or more orders from the first dispersive element and image the received one or more orders onto the feedback element.

13. The system of claim 1 , further comprising one or more third optical elements (i) having power along the non-dispersive dimension of the wavelength stabilizer and (ii) arranged to receive the wavelength-stabilized beams and cause chief rays thereof to be parallel in the non-dispersive dimension of the wavelength stabilizer.

14. The system of claim 1 , further comprising a beam splitter for transmitting wavelength-stabilized beams to the wavelength combiner.

15. The system of claim 1 , wherein the wavelength-stabilized beams are received by the wavelength combiner via the back facets of the beam emitters.

16. A multi-beam stabilizer and combining system comprising:
a wavelength stabilizer having a dispersive dimension and a non-dispersive dimension, the wavelength stabilizer comprising:
an array of beam emitters each (i) having front and back facets and (ii) emitting a beam,
one or more first optical elements (i) having power along the dispersive dimension of the wavelength stabilizer and (ii) arranged to receive the emitted beams and converge chief rays of the emitted beams, and
a first dispersive element arranged to receive the beams from the one or more first optical elements and disperse the beams into at least two orders, wherein one of the orders is reflected back to the array of beam emitters by a feedback element, thereby forming a resonator between the back facet of each beam emitter and the feedback element that stabilizes the beam emitted by each beam emitter to a unique wavelength; and

a wavelength combiner having a dispersive dimension and a non-dispersive dimension, the wavelength combiner comprising:
a second dispersive element, different from the first dispersive element, (i) having power along a beam-combining dimension, and (ii) arranged to receive the wavelength-stabilized beams and combine the beams into a multi-wavelength output.

17. The system of claim 16 , wherein the wavelength combiner comprises one or more second optical elements, different from the one or more first optical elements, arranged to receive the wavelength-stabilized beams and cause the beams to converge to the second dispersive element.

18. The system of claim 16 , wherein at least one of the first or second dispersive elements comprises at least one of a grating, a chirped grating, a surface grating, a volume grating, a transmission grating, or a prism.

19. The system of claim 16 , further comprising collimating optics for collimating the beams emitted by the array of beam emitters.

20. The system of claim 16 , wherein the array of beam emitters is one-dimensional or two-dimensional.

21. The system of claim 16 , wherein the feedback element is the first dispersive element.

22. The system of claim 16 , wherein the feedback element comprises a mirror arranged to receive one of the orders from the first dispersive element and reflect the received order back to the first dispersive element.

23. The system of claim 16 , wherein the feedback element comprises (i) a first mirror arranged to receive one of the orders from the first dispersive element and reflect the received order back to the first dispersive element, and (ii) a second mirror arranged to receive a different one of the orders from the first dispersive element and reflect the received order back to the first dispersive element.

24. The system of claim 23 , wherein the feedback element comprises one or more optical elements for imaging the beams onto the first mirror and/or the second mirror.

25. The system of claim 23 , wherein the feedback element comprises one or more quarter wave plates.

26. The system of claim 23 , wherein the feedback element comprises one or more slits for reduction of cross-talk between emitters.

27. The system of claim 16 , further comprising one or more third optical elements (i) having power along the non-dispersive dimension of the wavelength stabilizer and (ii) arranged to receive one or more orders from the first dispersive element and

Assignees

• Tayebati Parviz
• Chann Bien
• Teradiode Inc

Inventors

• Tayebati Parviz
• Chann Bien

Classifications

• H01S5/143

  Littman-Metcalf configuration, e.g. laser - grating - mirror · CPC title

• H01S3/08

  Construction or shape of optical resonators or components thereof · CPC title

• H01S3/2391

  emitting at different wavelengths · CPC title

• H01S3/0826 Primary

  using a diffraction grating · CPC title

• H01S3/08054

  Passive cavity elements acting on the polarization, e.g. a polarizer for branching or walk-off compensation (quarter-wave plates in a Q-switch laser H01S3/1124, H01S3/115) · CPC title