Abstract
A backward dark-optical-comb-injection mode-locked semiconductor optical amplifier fiber laser (SOAFL) with a femtosecond pulse width and an ultrahigh supermode-noise suppressing ratio (SMSR) is primarily demonstrated. The mode-locked SOAFL pulse with a spectral linewidth of is shortened from under chirp compensation in a long dispersion-compensated fiber, corresponding to a time–bandwidth product of 0.48. The eighth-order soliton is obtained by the nonlinearly soliton’s compression of the chirp-compensated SOAFL pulse in a long single-mode fiber at an input peak power of , providing the pulse width, the linewidth, and the nearly transform-limited time–bandwidth product are , , and 0.34, respectively. The phase noise and integrated timing jitter at an offset frequency below are and , respectively. An ultrahigh pulse-compression ratio of 43 and a SMSR of for the eighth-order SOAFL soliton are reported.
© 2006 Optical Society of America
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