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Enhanced stability of dispersion-managed mode-locked fiber lasers with near-zero net cavity dispersion by high-contrast saturable absorbers

Liu, HH and Chow, KK (2014) Enhanced stability of dispersion-managed mode-locked fiber lasers with near-zero net cavity dispersion by high-contrast saturable absorbers. Optics Letters, 39 (1). pp. 150-153. ISSN 0146-9592

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Abstract

We experimentally investigate the stability of dispersion-managed mode-locked fiber lasers using carbon-nanotubebased saturable absorbers (SAs) with different modulation depths. An unstable operation region of the mode-locked fiber laser with near-zero net cavity dispersion is observed, where the laser produces random pulse burst rather than stable pulse train. Through the implementation of high-contrast SAs in the laser, the unstable region is found to be shrunk by ?31.3% when the modulation depth of the SAs increases from 6.4% to 12.5%. The numerical simulation is consistent with the experimental observation. © 2013 Optical Society of America.

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