Controllable Dual-Wavelength Fiber Laser

We demonstrate a controllable dual-wavelength fiber laser which contains a master laser and a slave laser. The master laser is a kind of ring cavity laser which can be injected into by the slave laser. The output laser wavelength is controlled by injected power of the slave laser; both single- and dual-wavelength operation can be achieved. Under free running, the master laser generates 1064nm laser output. Here the slave laser is a 1072nm fiber laser. The 1064nm and 1072nm laser coexist in output spectrum for relatively low injected power. Dual-wavelength and power-ratio-tunable operation can be achieved. If the injected power of the slave laser is high enough, the 1064nm laser is extinguished automatically and there is only 1072nm laser output.