Regenerative properties of a pump-modulated four-wave mixing scheme in dispersion-shifted fibers

• Published in: Journal of lightwave technology Vol. 21; no. 9; pp. 1892 - 1902
• Main Authors: Bogris, A., Syvridis, D.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.09.2003; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Circuit properties; Computer simulation; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Extinction; Extinction ratio; Fiber nonlinear optics; Fibers; Four-wave mixing; Integrated optics. Optical fibers and wave guides; Modulation; Noise levels; Nonlinear optics; Optical and optoelectronic circuits; Optical fiber dispersion; Optical interferometry; Optical mixing; Optical pumping; Optical wavelength conversion; Pumps; Repeaters; Studies; Wavelengths; wavelength conversion; Noise reduction; Dispersion shifted fiber; optical fibers; Four-wave mixing (FWM); Optical frequency conversion; Optical fiber; Four wave mixing
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2003.814390

A new scheme for all-optical signal reshaping is proposed. It is shown that proper adjustment of the operating conditions of a wavelength converter based on four-wave mixing (FWM) in dispersion-shifted fiber (DSF) results in significant extinction ratio enhancement and noise suppression of the converted signal. The key issue in the proposed idea is the application of the modulation bitstream on the input pump wave. Detailed numerical simulation shows that it is possible to achieve a wavelength-converted output with extinction ratio of 20 dB when the extinction ratio of the input signal is 10.5 dB, while at the same time, the improvement in the Q-factor is almost 6 (from 6.5 at the input, it becomes more than 12 at the output). The theoretical predictions have been experimentally confirmed by measuring the transfer function of the FWM in a 17-km-long DSF under different operating conditions. The obtained results are in a very good agreement with those predicted theoretically.