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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 16, Iss. 4 — Apr. 1, 1998
  • pp: 542–

Signal-Induced Refractive Index Changes in Erbium-Doped Fiber Amplifiers

Mark Janos and Stephen C. Guy

Journal of Lightwave Technology, Vol. 16, Issue 4, pp. 542- (1998)


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Abstract

This paper reports the measurement and analysis of signal power-induced changes in the refractive index spectrum of an aluminosilicate erbium-doped fiber amplifier (EDFA). For a constant 980 nm pump power of 11 mW, a 1553 nm signal power of 4.6 mW caused a peak-to-trough change in refractive index of (3.8\;\pm\;0.4) \times 108 across the EDFA gain spectrum. A Kramers-Krnig transform of the signal-induced change in absorption coefficient agreed well with the measured change in refractive index. This result conflicts with the behavior of the system predicted by a homogeneously broadened two-level model and suggests limitations in the representation of the Er3+:glass system by a discrete set of homogeneously broadened transitions.

[IEEE ]

Citation
Mark Janos and Stephen C. Guy, "Signal-Induced Refractive Index Changes in Erbium-Doped Fiber Amplifiers," J. Lightwave Technol. 16, 542- (1998)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-16-4-542


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References

  1. C. Thirstrup, Y. Shi, and B. Palsdottir, "Pump-induced refractive index modulation and dispersions in Er3+-doped fibers," J. Lightwave Technol., vol. 14, pp. 732-738, May 1996.
  2. R. H. Pantell, M. J. F. Digonnet, R. W. Sadowski, and H. J. Shaw, "Analysis of nonlinear optical switching in an erbium-doped fiber," J. Lightwave Technol., vol. 11, pp. 1416-1424, Sept. 1993.
  3. W. Chow, G. Dente, and D. Depatie, "Saturation effects in the carrier-induced refractive index in a semiconductor gain medium," Opt. Lett., vol. 12, pp. 25-27, 1987.
  4. E. Desurvire, C. R. Giles, and J. R. Simpson, "Gain saturation effects in high-speed, multichannel erbium-doped fiber amplifiers at \lambda =1.53 \mum," J. Lightwave Technol., vol. 7, pp. 2095-2104, Dec. 1989.

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