Complete characterization of quantum-limited timing jitter in passively mode-locked fiber lasers.

Department of Electrical Engineering and Computer Science, and Research Laboratory of Electronics,Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
Optics Letters (Impact Factor: 3.18). 10/2010; 35(20):3522-4. DOI: 10.1364/OL.35.003522
Source: PubMed

ABSTRACT We characterize the timing jitter of passively mode-locked, femtosecond, erbium fiber lasers with unprecedented resolution, enabling the observation of quantum-origin timing jitter up to the Nyquist frequency. For a pair of nearly identical 79.4MHz dispersion-managed lasers with an output pulse energy of 450pJ, the high-frequency jitter was found to be 2.6fs [10kHz, 39.7MHz]. The results agree well with theoretical noise models over more than three decades, extending to the Nyquist frequency. It is also found that unexpected noise may occur if care is not taken in optimizing the mode-locked state.

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J. Cox