We propose and experimentally demonstrate a triple-wavelength fiber ring laser using a semiconductor optical
amplifier (SOA) in conjunction with an array waveguide grating (AWG). The experimental results show three lasing lines
with an adjustable wavelength separation and a large optical signal-to-noise ratio under room temperature. The three
channels operate at 1531.5 nm, 1532.3 nm and 1533.1 nm with a peak power above -23 dBm and optical signal to noise
ratio above 30 dB at SOA drive current of 350 mA. By changing the ports of the AWG, the center wavelengths of the triple
lasing lines can be changed and the wavelength separation between the lasing lines can also be changed. The proposed
laser configuration has the advantages of a simple and compact structure, quad-wavelength operation and the system can
be upgraded to generate more wavelengths.