are connected to each other comprises a first resonator and a second resonator, an optical signal by oscillating at a predetermined frequency coupling resonator for reducing the side-mode optical signal (side mode); The semiconductor optical amplifier to generate a laser light signal (Semiconductor Optical Amplifier; SOA); The multi-wavelength filter to the optical signal generated by the semiconductor optical amplifier is applied to the first resonator filter to the plurality of optical signals; And a multi-wavelength optical fiber laser device is characterized in that it comprises a variable optical coupler and outputting the separated at least a portion of the first resonator from the optical signal is disclosed. The method of multi-wavelength optical fiber laser oscillation apparatus and a multi-wavelength laser in accordance with an embodiment of the present invention, vernier (Vernier) by suppressing the oscillation of the side mode (side mode) effectively by the effect of providing a single mode laser wavelength to which, there is an advantage that can change the oscillation wavelength band by adjusting the power ratio of the output optical coupler.
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