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Passively synchronized two-color mode-locked fiber system based on master-slave lasers geometry

Matei Rusu, Robert Herda, and Oleg G. Okhotnikov

Open Access Open Access

Abstract

Using a master - slave configuration, a robust synchronization was achieved for two-color Erbium and Ytterbium mode-locked fiber lasers. Due to enhanced nonlinear interaction in the fiber, noise-free pulse-locking was achieved allowing for a cavity mismatch tolerance of 140 μm. This is the highest tolerable cavity-length difference ever been obtained for synchronized mode-locked oscillators.

©2004 Optical Society of America

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Figures (8)
Fig. 1.
Fig. 1. Configuration of the master-slave ultrashort pulse lasers synchronization setup.

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Fig. 2.
Fig. 2. (a) Autocorrelation trace of the master laser output pulse. Corresponding pulse spectrum is shown as an inset.

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Fig. 2.
Fig. 2. (b) Autocorrelation trace of slave laser output pulse. Corresponding pulse spectrum is shown as an inset.

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Fig. 3.
Fig. 3. Cavity detuning diagram for master/slave configuration: measured repetition rate of the Yb-fiber slave laser versus its cavity-length variation. The synchronization range is highlighted.

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Fig. 4.
Fig. 4. The wavelength of the slave laser versus the offset of the cavity length. The anomalous dispersion of the slave laser cavity is 2 ps/nm.

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Fig. 5.
Fig. 5. Slave laser cavity mismatch tolerance versus master laser pulse energy. The anomalous dispersion of the slave laser cavity is 2 ps/nm.

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Fig. 6.
Fig. 6. Slave laser cavity mismatch tolerance versus average dispersion of the cavity. The master pulse energy is 1.0 nJ.

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Fig. 7.
Fig. 7. Variation of RF power at the slave laser output in the synchronized mode. The central frequency corresponds to the repetition rate of the master laser. Bandwidth - 100 Hz.

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