Pulsed fiber laser light source, wavelength conversion laser light source, two-dimensional image display device, liquid crystal display device, laser machining device and laser light source provided with fiber

A pulsed fiber laser light source (100) is provided with an LD (101) for a pump for outputting excitation light, and a laser oscillator. The laser oscillator includes a first fiber (103), which contains a laser activation material and permits the excitation light to enter from the LD (101); a second fiber (106), which contains a laser activation material and is to be a region which excitation light substantially does not reach; and a pair of fiber gratings (102, 104) which are optically connected to the first and the second fibers (103, 106) by sandwiching the first and the second fibers (103, 106). An input current which drives the LD (101) is interrupted so that a first peak of a light pulse outputted from the laser oscillator is formed and a second peak thereof is not formed.