Patent ID: 7920605

Claim:
An all-fiber color laser, comprising: a pump light source, radiating laser beams; an optical fiber, connected to the pump light source, comprising: a multi-level wavelength gain medium; a first grating assembly comprising a first grating, a second grating and a third grating, wherein the first grating, the second grating and the third grating are sequentially connected; and a second grating assembly comprising a fourth grating, a fifth grating and a sixth grating, wherein the first grating assembly, the multi-level wavelength gain medium and the second grating assembly are adjacent; and a plurality of modulators, connecting to the second grating assembly, wherein the modulators comprise a first modulator, a second modulator and a third modulator, and the fourth grating, the fifth grating and the sixth grating are sequentially connected to the first modulator, the second modulator and the third modulator; wherein the laser beam stimulated via the gain medium generates a plurality of laser beams with various wavelengths, and the lengthwise deformation of the fourth grating, the fifth grating and the sixth grating is adjustable respectively via the modulators along the optic fiber to control the sequential output of red, green or blue light respectively.