Abstract
For the first time, the self-mode-locking regime was obtained in an all-fiber erbium laser with a cavity length of more than 1 km and a normal net cavity dispersion as large as 217 ps<sup>2</sup>. To construct this laser, only commercial telecommunication fibers and conventional fiber-optic elements were used. An original linear-ring cavity design with polarization instability compensation provides high reliability of the self-mode-locking regime and good frequency stability. The laser emits short (~5 ns) pulses with a record high energy (564.3 nJ) at a very low repetition rate (82.4 kHz) and a moderate pump power of 450 mW. Since no output saturation and no wave-breaking effects were observed at the available pump power, the pulse energy can be further augmented by increasing the pump power or (and) by lengthening the cavity. Such a laser can be used in LIDAR systems, telecommunications, and industry.
Published Version
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