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How do you reduce the instability in tuned amplifier? 

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In addition, the applied strain can be tuned by changing the dimensions of the amplifier structure.
In a uniform magnetic field, the instability exhibits an exceedingly narrow bandwidth, 2.5 MHz, which would be a great disadvantage in any practical application as an amplifier.
Proceedings ArticleDOI
01 Dec 2009
6 Citations
Bifurcation loci provide instability contours versus practical design parameters and can be used to evaluate the impact of the instability on the overall amplifier performance and to stabilize the amplifier.
Open accessProceedings ArticleDOI
Arlee V. Smith, Jesse J. Smith 
4 Citations
Gain saturation is strong in any efficient amplifier and we show how it can be exploited to raise instability thresholds be a factor of two or more while staying below the stimulated Brillouin threshold.
A detailed study of these nonlinear shifts reveals several ways to reduce these new sources of frequency instability.
Open accessProceedings ArticleDOI
Valenzuela, Bentley, Villablanca 
01 Jan 2005
12 Citations
Results show that both methods, if properly tuned, are effective techniques to reduce torsional oscillations and are robust to parameter variations.
Under high powers and low inversion (high amplifier saturation) the thermal effects dominate the instability behavior.
We demonstrate an approach to actively stabilize the beam profile of a fiber amplifier above the mode instability threshold.
The identification of the mechanisms behind the different instability phenomena will lead to an efficient derivation of accurate techniques for their elimination from the amplifier response.
A novel nonlinear analysis of high power amplifier instability has been developed.

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