Article comprising a multi-stage erbium-doped fiber amplifier

Details Article comprising a multi-stage erbium-doped fiber amplifier Article comprising a multi-stage erbium-doped fiber amplifier

1996-02-15

1997-05-27

Ngo, John

Optical waveguides

With optical coupler

Particular coupling function

385 24, 372 6, G02B 626

Patent

active

056339640

ABSTRACT:
Multistage Er-doped fiber amplifiers (EDFAs) advantageously use high numerical aperture (NA) fiber in the input stage, and low NA fiber in the output stage. The former typically is greater than 0.25, and the latter is less than 0.20. Such amplifiers can have high gain and low noise figure.

REFERENCES:
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patent: 5311525 (1994-05-01), Pantell et al.
J. M. P. Delavaux et al. "Multi-Stage Erbium-Doped Fiber amplifier Designs", J. of Lightwave Technology, vol. 13, No. 5, pp. 703-720 (1995).
B. Pedersen, et al., "Experimental and Theoretical Analysis of Efficient Erbium-Doped Fiber Power Amplifiers", IEEE Transactions Photonics Technology Letters, vol. 3, No. 12, pp. 1085-1087, (1991).
T. Kashiwada, et al. "Erbium-Doped Fiber Amplifier Pumped at 1.48 .mu.m with Extremely High Efficiency", IEEE Photonics, Technology Letters, vol. 3, No. 8, pp. 721-723, (1991).
R. S. Quimby et al., "Unconversion and 980-nm excited-state absorption in erbium-doped glass", Technical Abstracts, SPIE's International Symposium OE/Fibers, Paper 1789-06, (1992).
J. C. Livas et al., "A One-Watt, 10-Gbps High-Sensitivity Optical Communication System", IEEE Photonics Technology Letters, vol. 7, No. 5, (1995).
C. R. Giles et al., "Modeling Erbium-Doped Fiber Amplifiers", Journal of Lightwave Technology, vol. 9, No. 2, pp. 271-283, (1991).

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