10 GHz regeneratively mode-locked semiconductor optical amplifier fiber ring laser and its linewidth characteristics

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Abstract

A 10 GHz regeneratively mode-locked semiconductor optical amplifier fiber ring laser with a picosecond pulse duration was newly constructed, and the linewidth change of a longitudinal mode was measured for various laser cavity lengths using a delayed self-heterodyne detection method. The detected line shape was approximately Gaussian for cavity lengths of 3.4–171 m. This result indicates that the laser linewidth depends strongly on thermal or acoustic cavity length fluctuations. The linewidth was proportional to the inverse square root of the cavity length, and a linewidth of 1.7 kHz was obtained for a cavity length of 171 m.

Original languageEnglish
Pages (from-to)3513-3515
Number of pages3
JournalOptics Letters
Volume32
Issue number24
DOIs
Publication statusPublished - 2007 Dec 15

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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