Patent ID: 7944954

Claim:
A laser apparatus with all optical-fiber, comprising: a plurality of pumping light sources in different wave bands, wherein the pumping light sources comprise a first pumping light with a wavelength in a range from 790 nm to 825 nm, and a second pumping light with a wavelength in a range from 960 nm to 990 nm, a third pumping light with a wavelength in a range from 1450 nm to 1550 nm, and a fourth pumping light with a wavelength in a range from 900 nm to 930 nm; and an optical-fiber laser system, comprising an optical fiber at least doped with erbium (Er) element and ytterbium (Yb) element, wherein the optical-fiber laser system outputs a laser light of green through the pumping light sources, wherein the optical-fiber laser system comprises: a combiner, disposed on the optical fiber to receive the pumping light sources; and a green-light seed light source, input to the optical fiber also through the combiner, wherein the optical fiber directly forms a linear resonance cavity.