Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1993-11-19
1996-02-13
Moskowitz, Nelson
Optical: systems and elements
Optical amplifier
Optical fiber
385127, 372 6, H01S 306
Patent
active
054915813
ABSTRACT:
An optical amplifier which includes an optical fiber having an erbium doped core surrounded by cladding, a pump for pumping the fiber with pump light at a pump wavelength coupled to the fiber, input means for inputting a signal to be amplified to the amplifier and output means for outputting an amplified signal from the amplifier. The fiber has a NA higher than 0.2. The difference in the coefficient of thermal expansion of the core adjacent the core/cladding interface and the coefficient of thermal expansion of the cladding at at least one radius less than 2 .mu.m from said interface is lower than a predetermined value, corresponding to a ratio of erbium loss to background loss, at said pump wavelength, and greater than a minimum ratio of about 20 when erbium loss is 0.15 dB/m and about 120 when erbium loss is 3.5 dB/m.
REFERENCES:
patent: 4302074 (1981-11-01), Fleming et al.
patent: 4339173 (1982-07-01), Aggarwal et al.
patent: 4358181 (1982-11-01), Gulati et al.
patent: 4413882 (1983-11-01), Bailey et al.
patent: 4664473 (1987-05-01), Gannon
patent: 4782491 (1988-11-01), Sutzer
patent: 4820018 (1989-04-01), Melman et al.
patent: 5005175 (1991-04-01), Desurvine et al.
patent: 5027079 (1991-06-01), Desuvire et al.
patent: 5058976 (1991-10-01), Giovanni et al.
patent: 5119460 (1992-06-01), Bruce et al.
patent: 5148510 (1992-09-01), Barrelle et al.
Ghigo et al., 1986, "Opt. Fiber Charoc Standards", France Nov. 25, 1985, vol. 584, pp. 26, 32, abst. only provided.
Ghigo et al., CS Tech. Rep. (Italy), vol. 14, #2, pp. 93-98, Apr. 1986; abst only provided herewith.
Ghigo et al., OFCS Symp., Nov. 25, 1985, pp. 26-32 same as R above.
Patent Abstracts of Japan, vol. 16, No. 341 Jul. 1992.
Optical Fiber Communication Conference, Technical Digest Series vol. 5, Feb. 1992, New York, N.Y. pp. 148-149.
Moskowitz Nelson
Pirelli Cavi S.p.A.
LandOfFree
Rare earth doped optical fibre amplifiers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rare earth doped optical fibre amplifiers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rare earth doped optical fibre amplifiers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-243974