Optical injection-mode-locking of a weak-resonant-cavity Fabry-Perot laser diode based fiber ring

Optical injection mode-locking of a weak-resonant-cavity Fabry-Perot laser diode based fiber ring with an intra-cavity power controlled wavelength shift and a reducing chirp linewidth at high intra-cavity coupling ratio condition is demonstrated. Both the strong dark-optical comb and strong feedback coupling contribute to the wavelength spectrum shift toward longer wavelength, a wavelength shift from 1356 nm to 1542 nm of the weak-resonant-cavity FPLD based fiber ring associated with its pulsewidth and linwidth also reduced from from 37.5 to 29.5 ps and from 10 to 6 nm, respectively, can be observed. Furthermore, the peak-to-peak frequency chirp reduced from 3.5 to 1.8 GHz was caused by the shrink of linewidth.

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