Abstract: Simultaneous oscillation of 23 wavelengths, spaced at 100 GHz, is demonstrated from a single
source using a semiconductor optical amplifier linear cavity. The wavelength comb is generated from an
intra cavity, fiber implemented Lyotfilter. Each oscillating wavelength has a linewidth of 12.5 GHz and
the maximum power variation between the 23 wavelengths was less than 3 dB.
Abstract: We present recent advances in multi-wavelength, power-equalized laser sources that incorporate a semiconductor optical amplifier (SOA) and simple optical filters, such as Lyot-type and Fabry-Perot, for comb generation. Both linear and ring-cavity configurations are presented, and single-pass optical feedback technique is proposed to improve the performance in terms of the number of simultaneously oscillating lines and output channel power equalization. This technique resulted in a broadened oscillating spectrum of 52 lines spaced at 50 GHz, power-equalized within 0.3 dB. Finally, a simplified version that uses only an uncoated SOA for both gain and comb generation is demonstrated.