#NONLINEAR OPTICAL ISOLATOR PULSE PC#

#NONLINEAR OPTICAL ISOLATOR PULSE PC#

A figure-8 optical fiber pulse laser using a dispersion imbalanced nonlinear optical fiber loop mirror (DI-NOLM) comprising a linear part of the figure-8 optical fiber laser composed of a pump laser diode (LD), a wavelength division multiplexing (WDM) coupler, an erbium doped fiber (EDF), an optical isolator, a band pass filter (BPF), an output coupler, a dispersion compensated fiber (DCF), and a polarization controller (PC) a nonlinear loop part, DI-NOLM, composed of a single mode fiber (SMF), a dispersion shifted fiber (DSF), and a PC and an.ДЎ. 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.ДЎ. Therefore, the present invention provides a figure-8 optical fiber pulse laser using DI-NOLM improving the switching characteristic. Two optical fibers of different dispersion values are used at DI-NOLM. And the noise due to the bidirectional gain difference of the optical amplifier is reduced. The optical amplifier is not included in DI-NOLM, instead, it is located at the unidirectional linear loop part. The figure-8 optical fiber pulse laser according to the present invention produces stable femto-second optical pulses using DI-NOLM.

Nonlinear optical isolator pulse