L-band optical amplifier based on thulium-doped silica fiber...

Details L-band optical amplifier based on thulium-doped silica fiber... L-band optical amplifier based on thulium-doped silica fiber...

2005-04-05

2005-04-05

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Optical fiber

C359S341500

Reexamination Certificate

active

06876490

ABSTRACT:
A Thulium-doped silica fiber normally has its strongest gain at 1.9 microns and thus is not suitable for communication use. By engineering a W-profile or depressed cladding fiber with an appropriate index profile having a fundamental mode cut-off between 1.9 microns and the shorter wavelength of desired operation, an optical amplifier based on the W-profile Thulium-doped silica fiber operates at wavelengths shorter than conventional amplifiers, just above what is currently called the Erbium L-band. In a preferred embodiment, the cut-off wavelength is at or near 1.7 μm, eliminating longer wavelengths from the fiber. Amplifiers engineered according to the principles and techniques of the present invention can operate in the wavelength range between about 1.6 to 1.8 microns, which is particularly useful for telecommunications.

REFERENCES:
patent: 4515436 (1985-05-01), Howard et al.
patent: 4764933 (1988-08-01), Kozlovsky et al.
patent: 5056888 (1991-10-01), Messerly et al.
patent: 5260823 (1993-11-01), Payne et al.
patent: 5392154 (1995-02-01), Chang et al.
patent: 5452116 (1995-09-01), Kirkby et al.
patent: 5473714 (1995-12-01), Vengsarkar
patent: 5673342 (1997-09-01), Nelson et al.
patent: 5696782 (1997-12-01), Harter et al.
patent: 5801858 (1998-09-01), Roberts et al.
patent: 5818630 (1998-10-01), Fermann et al.
patent: 5867305 (1999-02-01), Waarts et al.
patent: 5880877 (1999-03-01), Fermann et al.
patent: 5892615 (1999-04-01), Grubb et al.
patent: 5930030 (1999-07-01), Scifres
patent: 5933271 (1999-08-01), Waarts et al.
patent: 6021141 (2000-02-01), Nam et al.
patent: 6049417 (2000-04-01), Srivastava et al.
patent: 6081369 (2000-06-01), Waarts et al.
patent: 6118575 (2000-09-01), Grubb et al.
patent: 6154321 (2000-11-01), Melville et al.
patent: 6181465 (2001-01-01), Grubb et al.
patent: 6212310 (2001-04-01), Waarts et al.
patent: 6278816 (2001-08-01), Keur et al.
patent: 6301271 (2001-10-01), Sanders et al.
patent: 6307994 (2001-10-01), Paek et al.
patent: 6445494 (2002-09-01), Nilsson et al.
patent: 6556757 (2003-04-01), Ellison et al.
patent: 6560009 (2003-05-01), Andrejco et al.
patent: 6563995 (2003-05-01), Keaton et al.
patent: 6647193 (2003-11-01), Krastev et al.
L.G. Cohen et al., “Radiating Leaky-Mode Losses in Single-Mode Lightguides with Depressed-Index Claddings,” IEEE Journal of Quantum Electronics, vol. QE-18, No. 10, Oct. 1982, pp. 1467-1472.
Ishikawa et al., “Novel 1500 nm-Band EDFA with Discrete Raman Amplifier,” ECOC-2001, Post Deadline Paper.
Stolen et al, “Short W-Tunneling Fibre Polarizers,” Electronics Letters, vol. 24, 1988, pp. 524-525.

Affiliated with

Also associated with

Rating

L-band optical amplifier based on thulium-doped silica fiber... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with L-band optical amplifier based on thulium-doped silica fiber..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and L-band optical amplifier based on thulium-doped silica fiber... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3407070