Figure-8 optical fiber pulse laser using a dispersion imbalanced nonlinear optical loop mirror

摘要

The present invention relates to a figure-8 optical fiber pulse laser using a dispersion imbalanced nonlinear optical loop mirror (DI-NOLM). The conventional figure-8 optical fiber pulse laser uses a nonlinear optical fiber mirror having an EDF as a gain material. The conventional laser has an advantage for the simple structure, and it can be easily constructed. However, it can not produce the stable optical pulse trains. ;The figure-8 optical fiber pulse laser according to the present invention produces stable femto-second optical pulses using DI-NOLM. The optical amplifier is not included in DI-NOLM, instead, it is located at the unidirectional linear loop part. And the noise due to the bidirectional gain difference of the optical amplifier is reduced. Two optical fibers of different dispersion values are used at DI-NOLM. Therefore, the present invention provides a figure-8 optical fiber pulse laser using DI-NOLM improving the switching characteristic. Especially, the stable femto-second laser according to the present invention is applicable for the many applications such as high-speed reaction measurements, laser treatments, and medical lasers.