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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 12 — Jun. 4, 2012
  • pp: 13539–13550

Gain dynamics and refractive index changes in fiber amplifiers: a frequency domain approach

Henrik Tünnermann, Jörg Neumann, Dietmar Kracht, and Peter Weßels  »View Author Affiliations

Optics Express, Vol. 20, Issue 12, pp. 13539-13550 (2012)

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Gain dynamics and refractive index changes in fiber amplifiers are important in many areas. For example, the knowledge of the frequency responses for seed and pump power modulation are required to actively stabilize low noise fiber amplifiers. Slow and fast light via coherent population oscillations rely on the change of group index to delay or advance pulses, and refractive index changes in fiber amplifiers are a possible explanation for mode fluctuations in high power fiber amplifiers. Here, we analyze the frequency dependent influence of seed and pump power modulation on the fiber amplifier output power and the refractive index. We explain the observed power and refractive index modulation with an analytic model originally developed for telecom amplifiers and discuss a further simplification of the model.

© 2012 OSA

OCIS Codes
(230.2285) Optical devices : Fiber devices and optical amplifiers
(140.3425) Lasers and laser optics : Laser stabilization

ToC Category:
Lasers and Laser Optics

Original Manuscript: March 16, 2012
Revised Manuscript: May 24, 2012
Manuscript Accepted: May 24, 2012
Published: June 1, 2012

Henrik Tünnermann, Jörg Neumann, Dietmar Kracht, and Peter Weßels, "Gain dynamics and refractive index changes in fiber amplifiers: a frequency domain approach," Opt. Express 20, 13539-13550 (2012)

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