Claims
- 1. A system, comprising:
an energy source; a first fiber coupled to the energy source so that pump energy from the energy source can be transferred to the first fiber; a second fiber; a WDM capable of transferring the pump energy from the first fiber to the second fiber; and a fiber Bragg grating in the second fiber, the fiber Bragg being capable of substantially reflecting energy at a predetermined wavelength, wherein the first fiber is devoid of a fiber Bragg grating capable of substantially reflecting energy at the predetermined wavelength.
- 2. The system of claim 1, wherein the second fiber is in the shape of a loop.
- 3. The system of claim 1, wherein the second fiber is in the shape of a circular loop.
- 4. The system of claim 1, wherein the predetermined wavelength comprises energy having a Stoke shifted wavelength.
- 5. The system of claim 4, wherein the Stoke shifted wavelength has an order greater than one.
- 6. The system of claim 5, wherein the order is two.
- 7. The system of claim 5, wherein the order is three.
- 8. The system of claim 5, wherein the order is four.
- 9. The system of claim 5, wherein the order is five.
- 10. The system of claim 1, further comprising a second fiber Bragg grating in the second fiber, the second fiber Bragg grating being capable of substantially reflecting energy at a second predetermined wavelength different than the first predetermined wavelength, wherein the first fiber is devoid of a fiber Bragg grating capable of substantially reflecting energy at the second predetermined wavelength.
- 11. The system of claim 1, further comprising: a third fiber, a second WDM, and a second fiber Bragg grating, the second fiber grating being in the third fiber, the second WDM being capable of transferring pump energy between the first and third fibers.
- 12. The system of claim 11, wherein the third fiber is in the shape of a loop.
- 13. The system of claim 11, wherein the third fiber is in the shape of a circular loop.
- 14. The system of claim 11, wherein the second predetermined energy comprises energy having a Stoke shifted wavelength.
- 15. The system of claim 11, further comprising a third fiber Bragg grating capable of substantially reflecting the pump energy, the third fiber Bragg grating being in the first fiber.
- 16. The system of claim 15, wherein the second WDM is between the energy source and the third fiber Bragg grating.
- 17. The system of claim 1, further comprising a second fiber Bragg grating capable of substantially reflecting the pump energy, the third fiber Bragg grating being in the first fiber.
- 18. The system of claim 17, wherein the WDM is between the energy source and the second fiber Bragg grating.
- 19. The system of claim 1, further comprising a coupler and a third fiber, the coupler being capable of transferring the predetermined energy from the second fiber to the third fiber.
- 20. The system of claim 19, further comprising a second fiber Bragg grating in the third fiber, the second fiber Bragg grating being capable of substantially reflecting the predetermined energy.
- 21. A system, comprising:
an energy source capable of producing pump energy; a fiber coupled to the energy source so that the pump energy can be transferred from the energy source to the fiber, the fiber having a loop-shaped portion, a first non loop-shaped portion, and a second non loop-shaped portion; a first fiber Bragg grating in the first non loop-shaped portion of the fiber, the first fiber Bragg grating being capable of substantially reflecting the pump energy; a second fiber Bragg grating in the second non loop-shaped portion of the fiber, the second fiber Bragg grating being capable of substantially reflecting energy having a wavelength comprising a Stoke shifted wavelength.
- 22. The system of claim 21, further comprising a third fiber Bragg grating in the second non loop-shaped portion of the fiber, the third fiber Bragg grating being capable of substantially reflecting energy having a wavelength comprising a second Stoke shifted wavelength.
- 23. The system of claim 22, further comprising a fourth fiber Bragg grating in the second non loop-shaped portion of the fiber, the third fiber Bragg grating being capable of substantially reflecting energy having a wavelength comprising a third Stoke shifted wavelength.
- 24. The system of claim 21, further comprising a coupler and a second fiber, the coupler being capable of transferring energy at a predetermined wavelength from the first fiber to the second fiber.
- 25. The system of claim 24, wherein the predetermined energy has a wavelength comprising the Stoke shifted wavelength.
- 26. The system of claim 23, wherein the predetermined energy has a wavelength comprising the Stoke shifted wavelength.
- 27. The system of claim 22, wherein the predetermined energy has a wavelength comprising the Stoke shifted wavelength.
- 28. The system of claim 21, wherein the predetermined energy has a wavelength comprising the Stoke shifted wavelength.
- 29. A system, comprising:
An energy source capable of producing pump energy; A fiber coupled to the energy source so that the pump energy from the energy source can be transferred to the fiber; A first pair of fiber Bragg gratings in the fiber, the gratings in the first pair being capable of substantially reflecting energy at a first wavelength corresponding to a first order Stoke shifted energy; A second pair of gratings in the fiber, the gratings in the second pair being capable of substantially reflecting energy at a second wavelength corresponding to an order of Stoke shifted energy that is greater than one; and A third pair of gratings in the fiber, the gratings in the third pair being capable of substantially reflecting energy at a third wavelength corresponding to an order of Stoke shifted energy that is greater than the second wavelength, Wherein the space between the second pair of gratings is devoid of a grating in the third pair of gratings.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority under 35 USC §119(e) to U.S. Provisional Patent Application Serial No. 60/267,252, filed on Feb. 7, 2001, and entitled “Raman Fiber Laser”, the entire contents of which are hereby incorporated by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60267252 |
Feb 2001 |
US |