Claims
- 1. An optical fiber having, at a wavelength of 1550 nm, a chromatic dispersion C from 5 to 11 ps/(nm.km), a ratio C/C′ of chromatic dispersion to chromatic dispersion slope from 250 to 370 nm, a derivative S′eff of effective surface area with respect to wavelength less than 0.14%/nm, a chromatic dispersion cancellation wavelength λ0 less than or equal to 1370 nm and an effective surface area greater than or equal to 50 μm.
- 2. The fiber of claim 1, characterized in that it exhibits monomode behavior in-cable in a range of wavelengths from 1460 nm, and preferably from 1300 nm.
- 3. The fiber of claim 1, characterized in that it has a theoretical cut-off wavelength less than or equal to 1850 nm and preferably less than or equal to 1800 nm.
- 4. The fiber of claim 1, characterized in that it has an effective surface area greater than or equal to 45 μm2 at a wavelength of 1460 nm.
- 5. The fiber of claim 1, characterized in that it has curvature losses less than or equal to 400 dB/m at a wavelength of 1625 nm, and preferably at a wavelength of 1675 nm, when wound around a 10 mm radius former.
- 6. The fiber of claim 1, characterized in that it has curvature losses less than 0.5 dB, and preferably less than 5×10−2 dB, at a wavelength of 1625 nm, and preferably at a wavelength of 1675 nm, when 100 turns are wound onto a 30 mm radius former.
- 7. The fiber of claim 1, characterized in that it has a polarization modal dispersion less than or equal to 0.1 ps/km1/2, and preferably 0.05 ps/km1/2, at a wavelength of 1550 nm.
- 8. The fiber of claim 1, characterized in that it has an attenuation of less than 0.24 dB/km, or even less than 0.22 dB/km, at a wavelength of 1550 nm.
- 9. The fiber of claim 1, characterized in that it has a ratio of the square of effective surface area to chromatic dispersion slope greater than or equal to 80,000 μm4.nm.km/ps at a wavelength of 1550 nm.
- 10. The fiber of claim 1, characterized in that it has a sensitivity to microcurvatures less than 1, and preferably less than 0.8, at a wavelength of 1550 nm.
- 11. The fiber of claim 1, characterized in that it has a trapezium or rectangle with buried trench and ring index profile.
- 12. The fiber of claim 11, characterized in that the difference (Δn1) between the index of the trapezium or the rectangle and the index of the cladding is from 5.9×10−3 to 7.8×10−3 and in that the radius (r1) of the part of the fiber having an index greater than that of the cladding is from 3.5 to 4.5 μm.
- 13. The fiber of claim 11, characterized in that the difference (Δn2) between the index of the depleted trench and the index of the cladding is from −8×10−3 to −1×10−3, and in that the outside radius (r2) of said trench is from 5.3 to 8.1 μm.
- 14. The fiber of claim 11, characterized in that the difference (Δn3) between the index of the ring and the index of the cladding is from 1×10−3 to 8×10−3 and in that the outside radius (r3) of said ring is from 7.2 to 11.1 μm.
- 15. The fiber of claim 11, characterized in that the ratio between the inside radius and the outside radius of the trapezium is greater than 0.4.
- 16. The fiber of claim 11, characterized in that the ratio between the inside radius and the outside radius of the trapezium is less than 0.95, even less than 0.90, and preferably less than 0.8.
- 17. The fiber of claim 11, characterized in that twice the integral of the product of the radius and the index between a zero radius and the outside radius (r1) of the central part of the fiber having an index greater than that of the cladding is from 76×10−3 to 114×10−3 μm2.
- 18. The fiber of claim 11, characterized in that twice the integral of the index between a zero radius and the outside radius (r1) of the central part of the fiber having an index greater than that of the cladding is from 46×10−3 to 56×10−3 μm2.
- 19. The fiber of claim 11, characterized in that twice the integral of the product of the radius and the index between the outside radius (r1) of the central part of the fiber having an index higher than that of the cladding and the inside radius (r2) of the ring is from −170×10−3 to −40×10−3 μm2.
- 20. The fiber of claim 11, characterized in that twice the integral of the product of the radius and the index between the inside radius (r2) and the outside radius (r3) of the ring is from 72×10−3 to 198×10−3 μm2.
- 21. The fiber of claim 11, characterized in that twice the integral of the product of the radius and the index between the outside radius (r1) of the central part of the fiber having an index greater than that of the cladding and the outside radius (r3) of the ring is from −38×10−3 to 90×10−3 μm2.
- 22. A wavelength division multiplex transmission system including the fiber according to claim 1 as line fiber.
Priority Claims (2)
Number |
Date |
Country |
Kind |
00 02316 |
Feb 2000 |
FR |
|
01 11047 |
Aug 2001 |
FR |
|
Parent Case Info
This is a Continuation-in-Part of application Ser. No. 09/788,562 filed Feb. 21, 2001.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
6396987 |
de Montmorillon et al. |
May 2002 |
B1 |
6459839 |
Sauvageon et al. |
Oct 2002 |
B1 |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09/788562 |
Feb 2001 |
US |
Child |
09/938532 |
|
US |