Multi-wavelength fiber laser based on two-dimensional active pi phase shift fiber bragg grating

The invention discloses a multi-wavelength fiber laser based on a two-dimensional active pi phase shift fiber bragg grating. The laser comprises a pumping source, a wavelength division multiplexer anda resonant cavity which are sequentially connected in series, the resonant cavity consists of the two-dimensional active pi phase shift fiber bragg grating, and the two-dimensional active pi phase shift fiber bragg grating comprises a fiber core; the fiber core comprises more than two sub-active pi phase shift fiber gratings, each sub-active pi phase shift fiber grating is parallel to the centralaxis of the fiber core, and the sub-active pi phase shift fiber gratings are not overlapped with each other and are not collinear. The laser has the advantages of being compact in structure, small insize and low in cost. 本发明公开了一种基于二维有源π相移光纤光栅的多波长光纤激光器，包括依次串联的泵浦源、波分复用器和谐振腔，所述谐振腔由二维有源π相移光纤光栅构成，所述二维有源π相移光纤光栅包括纤芯，所述纤芯包括两个以上子有源π相移光纤光栅，各子有源π相移光纤光栅与纤芯中心轴平行，各子有源π相移光纤光栅互不重叠且不共线。本发明具有结构紧凑、体积小、成本低的优点。