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  • Vol. 28, Iss. 23 — Dec. 1, 2003
  • pp: 2294–2296

Gain-flattened fiber Raman amplifiers with nonlinearity-broadened pumps

D. A. Chestnut and J. R. Taylor  »View Author Affiliations


Optics Letters, Vol. 28, Issue 23, pp. 2294-2296 (2003)
http://dx.doi.org/10.1364/OL.28.002294


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Abstract

Gain flattening of an E-band (1360–1460-nm) fiber Raman amplifier was achieved by pump spectral broadening to a 16.3-nm linewidth by use of nonlinearity in a 6.2-km standard fiber. With the broadened pump, the characteristic Raman gain ripple was removed and the 3-dB gain bandwidth was increased by 10.6 nm relative to the nonbroadened pump case. The experimental results agreed well with a gain profile simulation. The use of a 100-m holey fiber for pump broadening was also investigated near 1.56μm for U-band (1625–1675-nm) Raman amplifiers. Much less broadening was observed, which is believed to be a result of less four-wave mixing.

© 2003 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(190.5650) Nonlinear optics : Raman effect

Citation
D. A. Chestnut and J. R. Taylor, "Gain-flattened fiber Raman amplifiers with nonlinearity-broadened pumps," Opt. Lett. 28, 2294-2296 (2003)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-28-23-2294


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References

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