Single and Multi-Wavelength Reconfigurable SOA-Based Fast Tunable Fiber Laser

We demonstrate and experimentally investigate a single and multi-wavelength reconfigurable and fast tunable fiber laser based on the use of a semiconductor optical amplifier (SOA) gain medium, showcasing a switching time of <0.8 ns, a side mode suppression ratio of >45 dB and a tuning range of 6.4 nm. Tunable arrayed waveguide grating (AWG) and resonant cavities enable single longitudinal mode output. Flexible and reconfigurable single and multi-wavelength output can be realized by controlling the bias current of an SOA optical switch with a tunable AWG. The designed laser has good stability with a maximum output power of 17.1 dBm and a linewidth of 66.5 Hz. The laser has a longitudinal mode spacing of 0.8 nm, which is suitable for ITU-T standards and meets the light source requirements of optical packet switching.