Claims
- 1. An optical device comprising:
first and second facets; an at least partially arcuate waveguide formed on a substrate and including a portion coextensive to said first facet; and, a light amplification region coupled to said arcuate waveguide, said light amplification region including an expanding tapered portion and a contracting tapered portion wherein said contracting tapered portion approaches said second facet.
- 2. The device of claim 1, wherein said contracting region approaches said second facet of said optical device at an angle of about six degrees to perpendicular.
- 3. The device of claim 2, wherein said at least partially bent waveguide has a width of about three microns.
- 4. The device of claim 3, wherein said at least partially bent waveguide and amplification region are formed on a substrate including said first and second facets and an index of refraction difference between said at least partially bent waveguide and amplification region and said substrate ≦approximately 0.01.
- 5. The device of claim 1, wherein said waveguide is a ridge waveguide.
- 6. The device of claim 1, wherein at least a portion of said at least partially bent waveguide has a radius of curvature sufficiently large to curtail radiation of a mode propagating through said waveguide due to the curvature thereof.
- 7. The device of claim 1, wherein said radius of curvature is on the order of 1 mm.
- 8. The device of claim 1, further comprising a fiber optic coupled to said tapered portion of said waveguide.
- 9. The device of claim 8, wherein said fiber is doped so as to perform upconversion of light passing through said second facet.
- 10. The device of claim 9, further comprising a first plurality of frequency selective reflectors coupled to said fiber.
- 11. The device of claim 10, further comprising a second plurality of frequency selective reflectors, each of said second plurality of reflectors coupled to one of said first plurality of reflectors.
- 12. The device of claim 11, wherein each of said first plurality of reflectors is highly reflective for at least one select frequency and highly transmissive for at least one other frequency.
- 13. The device of claim 12, wherein at least one of said second plurality of reflectors is highly reflective for at least one select frequency and highly transmissive for at least one other frequency.
- 14. The device of claim 13, wherein at least one other of said second plurality of reflectors is only partially reflective for said at least one select frequency that said at least one of said second plurality of reflectors is highly reflective.
- 15. The device of claim 1 further comprising a crystal coupled to said second facet for performing upconversion of light passing through said second facet.
- 16. The device of claim 15, wherein said crystal is a periodically poled lithium niobate crystal.
- 17. The device of claim 15, further comprising a first plurality of frequency selective reflectors coupled to said crystal.
- 18. The device of claim 17, further comprising a second plurality of frequency selective reflectors, each of said second plurality of reflectors coupled to one of said first plurality of reflectors.
- 19. The device of claim 18, wherein each of said first plurality of reflectors is highly reflective for at least one select frequency and highly transmissive for at least one other frequency.
- 20. The device of claim 12, wherein at least one of said second plurality of reflectors is highly reflective for at least one select frequency and highly transmissive for at least one other frequency.
- 21. The device of claim 13, wherein at least one other of said second plurality of reflectors is only partially reflective for said at least one select frequency that said at least one of said second plurality of reflectors is highly reflective.
- 22. The device of claim 1, further comprising a highly reflective coating on said first facet.
- 23. The device of claim 1, further comprising an anti-reflective coating on said second facet.
- 24. The device of claim 1, wherein a transition from said expanding tapered portion to said contracting tapered portion is gradual.
- 25. A weakly guided angled stripe SLD comprising, a first ridge waveguide portion extending into a second arcuate waveguide portion between a first output facet and a second output facet with said arcuate waveguide having a tilt angle of between 5 to 10° with respect to said first ridge portion.
- 26. The SLD according to claim 25 wherein said tilt angle is closer to 60.
- 27. The SLD according to claim 25 wherein said arcuate waveguide portion is selected of a length to minimize radiation loss.
RELATED APPLICATION
[0001] This application claims priority of U.S. patent application serial No. 60/185,133, entitled “DOUBLE-PASS HIGH POWER SUPERLUMINESCENT DIODE (SLD) AND OPTICAL AMPLIFIER WITH MODE STABILIZATION”, filed Feb. 25, 2000, the entire disclosure of which is hereby incorporated by reference herein.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/US01/06039 |
2/23/2001 |
WO |
|