Study on chaos-control of a dual-ring erbium-doped fiber laser by dual-signal stimulating dual-pump

A method of dual-parameter control chaos in a dual-ring erbium-doped fiber laser is studied via stimulating dual-pump. And a chaos-control physical model is presented via considering the dual-parameter control technology and the laser structure characteristics. Dual-signal of periodic mutation as control signal is used to modulate to stimulate the two-pump to obtain chaos-control or pressure chaotic oscillation using same amplitude, same frequency, different amplitude or different frequency. A chaotic dual-ring erbium-doped fiber laser can be controlled to single-cycle, two-cycle, three-cycle, four-cycle and other multi-cycle. Low-cycle orbits are controlled to show in laser under the case of same amplitude and same frequency. High-cycle orbits are controlled to show in laser under the case of different amplitude or different frequency. Multi-cycle belt under the case of same amplitude and different frequency, controlled-frequency-locking region under the case of same amplitude and low frequency and controlled-semi-frequency-locking region under the case of same amplitude and high frequency are found. The results are helpful to the research of laser chaos and application of fiber laser.