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Simultaneous residual chromatic dispersion monitoring and frequency conversion with gain using a parametric amplifier

T. T. Ng, J. L. Blows, J. T. Mok, P. Hu, J. A. Bolger, P. Hambley, and B. J. Eggleton

Open Access Open Access

Abstract

We demonstrate that chromatic dispersion induced pulse-width broadening can be effectively monitored by a simple average power measurement of the filtered output from a parametric amplifier when additional four-wave mixing interactions are introduced. This all-optical technique also provides all-optical frequency conversion of the signal being monitored and signal gain.

©2003 Optical Society of America

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Figures (5)
Fig. 1.
Fig. 1. (Top) The signal undergoes dispersion compensation and then amplification and simultaneous frequency conversion. A simple average power measurement of a new monitor frequency is used to minimize the residual dispersion. (Bottom) The optical spectrum of points (I) through (IV). The peaks are signal (s), pump (p), idler (i) and monitor (m)

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Fig. 2.
Fig. 2. Schematic diagram of the experimental setup. PC-Polarization controller, FBG-Fiber Bragg grating and circulator based filter, MFL-Modelocked fiber laser, TDC-Tuneable dispersion compensator, VA-Variable attenuator, Attn-Attenuator, TBF-Tuneable bandpass filter, PM-Power meter, OSA-Optical Spectrum Analyzer.

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Fig. 3.
Fig. 3. (Left) The output from the device measured on the optical spectrum analyzer. (Right) The measured gain spectrum.

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Fig. 4.
Fig. 4. (Left) The measured power transfer function between points A and B in Fig. 2 and (Right) the measured power and predicted power in peak (e) as a function of dispersion.

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Fig. 5.
Fig. 5. (1.1 MB) Animation showing the evolution of the pulse train at ‘A’ and the corresponding spectral and power measurements.

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