Abstract
We propose a multi-wavelength laser source based on an enhanced four-wave-mixing (FWM) effect which is achieved when a highly nonlinear fiber (HNLF) and an Erbium-doped fiber amplifier (EDFA) are employed in a fiber loop. A multi-wavelength laser source with totally 28 new wavelengths and a wavelength spacing of 0.8 nm is demonstrated. The wavelength spacing of the proposed multi-wavelength laser source can be tuned from 0.1 to 5.0 nm, and output spectrum of the multi-wavelength laser source with the wavelength spacing of 0.4, 0.8, and 1.6 nm are presented.
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