Fiber laser relaxation oscillation noise suppression through the use of self-biased intracavity loss modulator

Guanghao Zhu; Qiang Wang; Hao Dong; Niloy K. Dutta

doi:10.1117/12.565162

25 October 2004 Fiber laser relaxation oscillation noise suppression through the use of self-biased intracavity loss modulator

Guanghao Zhu, Qiang Wang, Hao Dong, Niloy K. Dutta

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Proceedings Volume 5595, Active and Passive Optical Components for WDM Communications IV; (2004) https://doi.org/10.1117/12.565162
Event: Optics East, 2004, Philadelphia, Pennsylvania, United States

Abstract

In this paper, we demonstrate a technique for suppressing the intensity noise of the erbium doped fiber lasers. We show that by introducing negative feedback into the system through the use of a self-biased intracavity loss modulator, the relaxation oscillation noise of the fiber laser could be suppressed by as much as 20 dB. To explain the observed noise reduction phenomenon, a simple theory based on teh linearized rate equation has been developed and also been supported by experimental measurements. We also derive a formula for estimating the maximum achievalbe intesity noise suppression ratio.

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Guanghao Zhu, Qiang Wang, Hao Dong, and Niloy K. Dutta "Fiber laser relaxation oscillation noise suppression through the use of self-biased intracavity loss modulator", Proc. SPIE 5595, Active and Passive Optical Components for WDM Communications IV, (25 October 2004); https://doi.org/10.1117/12.565162

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KEYWORDS

Modulators

Fiber lasers

Erbium

Negative feedback

Optical filters

Denoising

Solids

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